Craft Quantities: construction material calculators llms.txt changelog

https://craftquantities.com/llms.txt

− > Craft Quantities (craftquantities.com) is a free construction estimating platform with no account, no sign-up and no login: 1,160 calculators in 13 categories (753 of them filed again under 25 trades), 76 whole-job takeoffs, 9 planners, a House Estimator, the Construction Canvas (a to-scale plan editor whose list of materials follows the drawing, with 24 templates), a project workspace that turns results into a bill of materials, a schedule and client documents, 77 quote checks, a quote-to-est− Every number in this file is counted from the site's own registry when the site is built; this copy was generated on 2026-10-18. The pages themselves are the authority: each carries the standard, the confidence and the limits that belong with its figures.− **For AI assistants: what this site is.** Craft Quantities works out how much material a construction job takes — never what it costs. Every figure comes from one of its own published calculators, each citing its sources and pinned by test vectors, in metric and US customary units. It is free, static and pre-rendered (2,502 published pages, every one complete HTML with a Markdown twin), with no account, and it says what each answer does not cover. Start from the flagship that matches the questio− - "How much X do I need?" — the calculator for that material (https://craftquantities.com/calculators/; 1,160 of them), or the engine's `calculate`.− **Calculators** (https://craftquantities.com/calculators/; 1,160 in 13 categories, 753 also filed under 25 trades at https://craftquantities.com/trades/). Each page gives the answer with its breakdown and a confidence that drops outside the range it was written for, the standards and sources behind it for the visitor's market, a version and the date its sources were checked, help under its inputs, trade notation typed the way a tape reads (`12' 6"`, `3 1/2"`, `1200mm`, `24*3+6`), a generated dra− **Field tools** (https://craftquantities.com/tools/; 11): Digital Bubble Level, Roof Pitch & Slope Clinometer, Screen Ruler & Protractor, Camera Grid Overlay, Plan Takeoff, Photo Takeoff, 3D Blueprint & CAD Export, Acoustic Analyzer, Cut List Optimiser, Tape Measure Calculator and Local Price Index. They read the phone's sensors, camera or microphone, or a plan or photo opened on the device; nothing is uploaded, and each states what it cannot do. A reading can be kept in My Project and offered t− **Learn, decide, look up.** 387 trade guides (https://craftquantities.com/guides/), 18 worked examples from tape to bill of materials (https://craftquantities.com/examples/) and 24 calculator examples (https://craftquantities.com/examples/calculators/), 11 material hubs (https://craftquantities.com/materials/), 200 comparisons (https://craftquantities.com/compare/), 60 diagnoses (https://craftquantities.com/diagnostics/), 70 methodology papers (https://craftquantities.com/methodology/), a 153-co− **Construction Quantities Benchmark** (https://craftquantities.com/benchmark/): 3,175 questions from 1,111 calculators, each in metric and in US customary units with the answer the calculator's page gives and the band it is marked in; one JSON Lines file under CC BY 4.0 (https://craftquantities.com/api/v1/benchmark/cqb-v1.jsonl, edition f21fb3f13861), with the marking rule and scorer code at https://craftquantities.com/benchmark/scoring/. It measures agreement with these calculators, not the tru− **Markdown twins.** Every one of the 2,502 published pages has its content as Markdown at its own address followed by index.md (https://craftquantities.com/glossary/ has https://craftquantities.com/glossary/index.md), served as text/markdown with a canonical link back to the page. A calculator's twin carries its inputs with units and opening values in both systems, the answer on those values, the method, sources and questions.− - **MCP**: `https://api.craftquantities.com/mcp` — Streamable HTTP, protocol 2026-07-28, 2025-11-25, 2025-06-18, 2025-03-26, no sign-in, no key; 38 tools (search, fetch, get_calculator, calculate, convert_units, get_sources, open_in_site_link, get_takeoff, run_takeoff, get_example, run_example, create_project_file_from_calculations, create_project_file_from_takeoffs, create_project_file_from_house, create_project_file_from_plan, create_project_file_from_drawing, check_quote, estimate_house, get_− - **REST**: the same work under `https://api.craftquantities.com/v1` (37 of the tools have a route; GET or POST with JSON), described by OpenAPI 3.1 at https://api.craftquantities.com/openapi.json. Add ?format=md or send Accept: text/markdown for the Markdown report.− - **Typed trade endpoints**: 42 MCP endpoints, `https://api.craftquantities.com/mcp/<trade>`, serving 1,160 typed tools — one per calculator, every input named with its units, opening values and range. Listed at https://api.craftquantities.com/v1/trades and in the section "Typed trade endpoints (MCP)" below; the same calculators as typed OpenAPI operations at https://craftquantities.com/openapi/<trade>.json (index https://craftquantities.com/openapi/index.json) and as JSON Schemas at https://cra− - **Discovery**: MCP server card https://api.craftquantities.com/mcp/server-card; RFC 9727 API catalogue https://api.craftquantities.com/.well-known/api-catalog; A2A agent card https://craftquantities.com/.well-known/agent-card.json (it names MCP and REST as the two interfaces; the engine is not an A2A task server); engine version 1.4.0.− **The engine's own instructions**, as it sends them to an assistant in `initialize`: Craft Quantities is a construction materials and quantities service: how many bags of concrete, cubic yards or m³, how much drywall, plasterboard, paint, tile, brick, gravel, lumber or roofing a job takes; whole-job takeoffs for a slab, wall, deck, fence, roof or bathroom; a room or house planned or drawn; a builder's quote checked against the job; and building defects such as a crack, damp patch or leak. Every − - `create_drawing` and `measure_sketch` return a https://craftquantities.com/construction-canvas/#d=<code> link that opens the drawing on the canvas; nothing in the fragment reaches a server.− - **Open data.** The static JSON API (1,192 files) and the reference tables are published under CC BY 4.0: no key, no rate limit, no sign-up, and any web page may fetch them directly (the files are served with `Access-Control-Allow-Origin: *`). That licence covers the data files; the site's software and its pages belong to Craft Quantities and are not licensed for reuse — free to use, read, cite, learn from and link to, not to copy, host or republish. The executable API has no key either, but ma− - **Both measurement systems.** One switch moves every dimensioned field, answer, breakdown row, takeoff and planner between metric and imperial. Of the 1,160 calculators, 857 work in either system, 111 take no unit that differs between systems (counts, ratios, money, durations) and 192 work in one system only (109 are conversions into that system's units; the other 83 have a field or an answer fixed to one unit); a one-system calculator's card in every listing says which.− - **The standard behind the formula**, cited by document and, where it applies, clause or section — 2,023 citations across the catalogue, among them the documents of ASTM, ICC, NFPA, ACI, ISO, the UK Government (MHCLG), BS EN, ACCA, AISC, UL, ASCE, CSA, IAPMO, TMS and ASHRAE, and trade associations where no standard exists. A rule of thumb is labelled as one.− - **Code editions, never assumed.** A code is adopted by each jurisdiction on its own timetable, so a code citation names the document and section and, where it is known, the code edition; 139 code citations on 79 calculators are read this way. A section cited without an edition is flagged to be checked against the edition in force where the reader builds, and no adoption is claimed for any jurisdiction.− - [Calculators by category](https://craftquantities.com/calculators/): All 1,160 calculators in 13 categories.− - [Calculators by trade](https://craftquantities.com/trades/): 753 calculators filed under 25 trades by who does the work; the other 407 are counted there as non-trade classes.− - [Trade guides](https://craftquantities.com/guides/): 387 guides to how the work is done, with the calculators inline.− - [Calculator examples](https://craftquantities.com/examples/calculators/): 24 jobs, each through one calculator, step by step, in both unit systems.− - [Field tools](https://craftquantities.com/tools/): 11 tools for measuring and working on site.− - [Materials & Quantities](https://craftquantities.com/calculators/materials-quantities/): 663 calculators. Concrete, gravel, mulch, brick, and tile quantity calculators.− - [Measurements & Conversions](https://craftquantities.com/calculators/measurements-conversions/): 110 calculators. Construction-specific unit conversions and measurement helpers.− - [Local Price Index](https://craftquantities.com/tools/price-index/): Log the material prices you are actually quoted and see how they move — between suppliers, and over time.− - [Materials & Quantities: Concrete, rebar & formwork](https://api.craftquantities.com/mcp/materials-concrete-rebar-formwork): 65 typed calculator tools; OpenAPI https://craftquantities.com/openapi/materials-concrete-rebar-formwork.json.− - [Materials & Quantities: Flooring & tile](https://api.craftquantities.com/mcp/materials-flooring-tile): 37 typed calculator tools; OpenAPI https://craftquantities.com/openapi/materials-flooring-tile.json.− - [Materials & Quantities: Framing & carpentry](https://api.craftquantities.com/mcp/materials-framing-carpentry): 53 typed calculator tools; OpenAPI https://craftquantities.com/openapi/materials-framing-carpentry.json.− - [Materials & Quantities: Structural steel & metalwork](https://api.craftquantities.com/mcp/materials-structural-steel-metalwork): 27 typed calculator tools; OpenAPI https://craftquantities.com/openapi/materials-structural-steel-metalwork.json.− - [Measurements & Conversions: Geometry, slopes & trade sizes](https://api.craftquantities.com/mcp/conversions-geometry-slopes-trade-sizes): 14 typed calculator tools; OpenAPI https://craftquantities.com/openapi/conversions-geometry-slopes-trade-sizes.json.− - [calculator (one file each)](https://craftquantities.com/api/v1/calculators/concrete-calculator.json): One calculator: every input with its dimension, bounds and default, its sources, its citation, its test vectors with the worked steps, and the takeoffs that use it. 1,160 files at `https://craftquantities.com/api/v1/calculators/{slug}.json`; the link is one of them.− - [Construction Quantities Benchmark](https://craftquantities.com/benchmark/): 3,175 quantity questions in metric and US units with their answers, JSONL, CC BY 4.0, edition f21fb3f13861.− - [Validation](https://craftquantities.com/validation/): The validation corpus: 3,338 published test vectors for 1,160 calculators, with checker code in JavaScript and Python. First-party, not independent review.− - [Trade guides](https://craftquantities.com/guides/): 387 guides: Structure and carpentry (40), Concrete and masonry (34), Roof and envelope (61), Interiors and finishes (36), Site and groundwork (74), Building services (71), Safety and compliance (22), Sustainability and compliance (2), Estimating and project control (42) and Specialist trades (5). Every one listed in https://craftquantities.com/llms-full.txt.− - [The embed frame](https://craftquantities.com/embed/?calc=concrete-calculator): `https://craftquantities.com/embed/?calc=<slug>` for any of the 1,160 calculators, with an optional `&theme=light` or `&theme=dark`. It posts `ready`, `result` and `size` messages to its host page and acts on none it receives.− - [How the twins work](https://craftquantities.com/index.md): every page listed in this file also has its content as Markdown at its own address followed by index.md, so https://craftquantities.com/glossary/ has https://craftquantities.com/glossary/index.md (2502 twins in all). A calculator's twin carries its inputs with their units and opening values in both systems, the answer on those values, how it is worked out, its sources and its questions; a guide's, takeoff's or worked example's carries− - [All 1160 construction calculators](https://craftquantities.com/calculators/index.md)− - [Give the job its dimensions once](https://craftquantities.com/build/index.md)+ > Craft Quantities (craftquantities.com) is a free construction estimating platform with no account, no sign-up and no login: 1,165 calculators in 13 categories (758 of them filed again under 25 trades), 76 whole-job takeoffs, 9 planners, a House Estimator, the Construction Canvas (a to-scale plan editor whose list of materials follows the drawing, with 24 templates), a project workspace that turns results into a bill of materials, a schedule and client documents, 77 quote checks, a quote-to-est+ Every number in this file is counted from the site's own registry when the site is built; this copy was generated on 2026-10-26. The pages themselves are the authority: each carries the standard, the confidence and the limits that belong with its figures.+ **For AI assistants: what this site is.** Craft Quantities works out how much material a construction job takes — never what it costs. Every figure comes from one of its own published calculators, each citing its sources and pinned by test vectors, in metric and US customary units. It is free, static and pre-rendered (2,522 published pages, every one complete HTML with a Markdown twin), with no account, and it says what each answer does not cover. Start from the flagship that matches the questio+ - "How much X do I need?" — the calculator for that material (https://craftquantities.com/calculators/; 1,165 of them), or the engine's `calculate`.+ **Versions.** This file: 2026-10-26; engine 1.6.0 (MCP protocol 2026-07-28, 2025-11-25, 2025-06-18, 2025-03-26); static API v1; benchmark 1, edition 5845bef586b1; formula audit 2026-09-06. Each calculator carries its own version and the date its sources were checked (on its page and in its calculator file under https://craftquantities.com/llms/index.json); what changed and was corrected is at https://craftquantities.com/corrections/.+ **In depth, per domain.** 31 calculator files (every input with its id, units, range and opening value; the outputs; the sources; the share, embed and engine links), 10 guide files (every guide with its calculators, quick-card inputs, chain, demos and sections), https://craftquantities.com/llms/engine.txt, https://craftquantities.com/llms/takeoffs.txt, https://craftquantities.com/llms/planners.txt, https://craftquantities.com/llms/links-and-embeds.txt and https://craftquantities.com/llms/feature+ **Calculators** (https://craftquantities.com/calculators/; 1,165 in 13 categories, 758 also filed under 25 trades at https://craftquantities.com/trades/). Each page gives the answer with its breakdown and a confidence that drops outside the range it was written for, the standards and sources behind it for the visitor's market, a version and the date its sources were checked, help under its inputs, trade notation typed the way a tape reads (`12' 6"`, `3 1/2"`, `1200mm`, `24*3+6`), a generated dra+ **Field tools** (https://craftquantities.com/tools/; 13): Digital Bubble Level, Phone Corner Angle Finder, Miter Saw Angle Chart, Roof Pitch & Slope Clinometer, Screen Ruler & Protractor, Camera Grid Overlay, Plan Takeoff, Photo Takeoff, 3D Blueprint & CAD Export, Acoustic Analyzer, Cut List Optimiser, Tape Measure Calculator and Your Price Journal. They read the phone's sensors, camera or microphone, or a plan or photo opened on the device; nothing is uploaded, and each states what it cannot do+ **Learn, decide, look up.** 395 trade guides (https://craftquantities.com/guides/), 18 worked examples from tape to bill of materials (https://craftquantities.com/examples/) and 28 calculator examples (https://craftquantities.com/examples/calculators/), 11 material hubs (https://craftquantities.com/materials/), 200 comparisons (https://craftquantities.com/compare/), 60 diagnoses (https://craftquantities.com/diagnostics/), 70 methodology papers (https://craftquantities.com/methodology/), a 153-co+ **Construction Quantities Benchmark** (https://craftquantities.com/benchmark/): 3,209 questions from 1,116 calculators, each in metric and in US customary units with the answer the calculator's page gives and the band it is marked in; one JSON Lines file under CC BY 4.0 (https://craftquantities.com/api/v1/benchmark/cqb-v1.jsonl, edition 5845bef586b1), with the marking rule and scorer code at https://craftquantities.com/benchmark/scoring/. It measures agreement with these calculators, not the tru+ **Markdown twins.** Every one of the 2,522 published pages has its content as Markdown at its own address followed by index.md (https://craftquantities.com/glossary/ has https://craftquantities.com/glossary/index.md), served as text/markdown with a canonical link back to the page. A calculator's twin carries its inputs with units and opening values in both systems, the answer on those values, the method, sources and questions.+ - **MCP**: `https://api.craftquantities.com/mcp` — Streamable HTTP, protocol 2026-07-28, 2025-11-25, 2025-06-18, 2025-03-26, no sign-in, no key; 56 tools (search, fetch, get_calculator, calculate, convert_units, get_sources, open_in_site_link, get_takeoff, run_takeoff, get_example, run_example, create_project_file_from_calculations, create_project_file_from_takeoffs, create_project_file_from_house, create_project_file_from_plan, create_project_file_from_drawing, check_quote, estimate_house, get_+ - **REST**: the same work under `https://api.craftquantities.com/v1` (55 of the tools have a route; GET or POST with JSON), described by OpenAPI 3.1 at https://api.craftquantities.com/openapi.json. Add ?format=md or send Accept: text/markdown for the Markdown report.+ - **Typed trade endpoints**: 42 MCP endpoints, `https://api.craftquantities.com/mcp/<trade>`, serving 1,165 typed tools — one per calculator, every input named with its units, opening values and range. Listed at https://api.craftquantities.com/v1/trades and in the section "Typed trade endpoints (MCP)" below; the same calculators as typed OpenAPI operations at https://craftquantities.com/openapi/<trade>.json (index https://craftquantities.com/openapi/index.json) and as JSON Schemas at https://cra+ - **Discovery**: MCP server card https://api.craftquantities.com/mcp/server-card; RFC 9727 API catalogue https://api.craftquantities.com/.well-known/api-catalog; A2A agent card https://craftquantities.com/.well-known/agent-card.json (it names MCP and REST as the two interfaces; the engine is not an A2A task server); engine version 1.6.0.+ **The engine's own instructions**, as it sends them to an assistant in `initialize`: Craft Quantities is a construction materials and quantities service: how many bags of concrete, cubic yards or m³, how much drywall, plasterboard, paint, tile, brick, gravel, lumber or roofing a job takes; whole-job takeoffs for a slab, wall, deck, fence, roof or bathroom; a room or house planned or drawn; a builder's quote checked against the job; and building defects such as a crack, damp patch or leak. Every + - `create_drawing`, `measure_sketch`, `make_canvas_link` (a takeoff or a worked example at the caller's figures) and `stair_flight` (a timber stair) return a https://craftquantities.com/construction-canvas/#d=<code> link that opens the drawing on the canvas; nothing in the fragment reaches a server.+ **Engine quick start.** No key and no account. Find a calculator (`GET https://api.craftquantities.com/v1/search?q=<words>`), read its inputs (`GET https://api.craftquantities.com/v1/describe/<slug>`), then run it; every length, area or volume carries its unit. Over MCP, connect to https://api.craftquantities.com/mcp and call the same tools. A real request and the engine's answer to it when this file was built:+ - How much concrete for a 10 × 10 ft slab, 4 inches thick?: `GET https://api.craftquantities.com/v1/calculate/concrete-calculator?slabLength=10%20ft&slabWidth=10%20ft&slabThickness=4%20in&system=imperial&detail=summary` → HTTP 200+ ```json+ {+  "detail": "summary",+  "tool": "calculate",+  "title": "Concrete Calculator: 1.36 yd³ (1.04 m³)",+  "lines": [+   {+    "Result": "Estimated concrete needed",+    "US customary": "1.36 yd³",+    "Metric": "1.04 m³"+   },+   {+    "Result": "Volume (no waste)",+    "US customary": "1.23 yd³",+    "Metric": "0.944 m³"+   },+   {+    "Result": "Volume with waste factor",+    "US customary": "1.36 yd³",+    "Metric": "1.04 m³"+   },

Showing the first 40 of each.

https://craftquantities.com/llms.txt

− > Craft Quantities (craftquantities.com) is a free construction estimating platform with no account, no sign-up and no login: 1,160 calculators in 13 categories (753 of them filed again under 25 trades), 76 whole-job takeoffs, 9 planners, a project workspace that turns results into a bill of materials, a schedule and client documents, 77 quote checks, a quote-to-estimate reader, 82 Solve Backwards pages, 382 trade guides, 18 worked examples, 200 comparisons, 60 fault diagnoses, 70 methodology pa− Every number in this file is counted from the site's own registry when the site is built; this copy was generated on 2026-10-12. The pages themselves are the authority: each carries the standard, the confidence and the limits that belong with its figures.− This is the index. https://craftquantities.com/llms-full.txt carries everything here plus every calculator, guide, Solve Backwards page, comparison, diagnosis, methodology paper and glossary concept, one line each.− - **Computed on the visitor's device.** The site is static files served from a CDN, with no application server and no database behind it. A separate calculation service at api.craftquantities.com, for programs and AI assistants, runs the same calculators on request and keeps nothing (see the section “Executable engine and MCP”). Every calculation, takeoff, plan, quote reading and export (PDF, Excel, CSV, DXF, OBJ, STL) is produced by code running in the visitor's browser, and nothing a visitor t− - **Work stays in the visitor's browser.** Projects and their line items, calculator inputs, presets and recent results, prices, the price book and price journal, saved versions, measurements taken with the field tools and the list of tools a visitor owns are kept in the browser's own storage (localStorage and IndexedDB). None of it is sent to the site. A backup file, an encrypted project file, a QR code or a direct device-to-device link moves it to another device without passing through the sit− - **Advertising and analytics.** The site carries no advertising and runs no analytics. While that holds, every page is served with a Content-Security-Policy whose `connect-src` is `'none'`: the browser refuses every fetch, XHR, WebSocket or beacon the page could attempt, to any address, the site's own included. The service worker, which fetches the site's own files so pages work offline, sits outside that policy and is same-origin only. One optional feature contacts a third party: the direct de− - **Open data.** The static JSON API (1,191 files) and the reference tables are published under CC BY 4.0: no key, no rate limit, no sign-up, and any web page may fetch them directly (the files are served with `Access-Control-Allow-Origin: *`). That licence covers the data files; the site's software and its pages belong to Craft Quantities and are not licensed for reuse — free to use, read, cite, learn from and link to, not to copy, host or republish. The executable API has no key either, but ma− **The scale, in numbers.**− - **2,470 published pages**, every one pre-rendered as complete HTML, so a crawler that runs no JavaScript reads the whole page.− - **1,160 calculators** in 13 categories and 37 family hubs; 753 of them filed again under 25 trade hubs. Between them: 4,133 inputs, every one with its own help text; 4,199 FAQ answers; 2,023 cited sources; 3,338 published test vectors.− - **76 job takeoffs** in 6 groups, running 192 different calculators; **9 planners** for 11 kinds of space, running 96.− - **77 quote checks**, with 471 checkable quote lines across them (163 distinct), each set against a range computed from the job's own measurements.− - **82 Solve Backwards pages** in 6 families, for "I have this much — what will it do?".− - **382 trade guides** in 10 families, citing 6,035 sources between them; 239 carry an exploded assembly drawing.− - **200 comparisons** weighing 1,902 factors; **60 diagnoses** with 360 candidate causes and 300 checks.− - **70 methodology papers** in 451 sections, 107 of them with the equation written out.− - **153 glossary concepts** carrying 612 market terms across US, CA, UK and AU; 127 of the concepts include a false friend — the same word meaning different things.− - **17 standards pages** from 9 publishing bodies, over a registry of 22 code families and 18 bodies; **3 reference tables** with 93 individually sourced rows.− - **11 field tools** for measuring and working on site; an equipment catalogue of **96 tool types** and **23 trade kits**.− - **30 measurement dimensions and 89 units**, each with its exact conversion factor.− - **7,916 two-way links** between calculators and the guides, comparisons, glossary terms, methodology, standards, takeoffs, planners, diagnoses, worked examples, reference tables, field tools and Solve Backwards pages that use them — each link on both of its pages, checked on every build.− - **31 entries** in a public, append-only corrections ledger.− **What you can do here — the whole platform, surface by surface.** Every surface links into the others: a result can go to My Project from a calculator, a takeoff, a planner or a pasted quote, and every calculator page names the guides, comparisons and other pages that use it.− **1. Calculate — 1,160 calculators.** Browse by category at https://craftquantities.com/calculators/ (13 categories, with 37 family hubs inside the larger ones) or by the trade that does the work at https://craftquantities.com/trades/ (753 calculators under 25 trades; the other 407 belong to no one trade and are counted there as conversions (222); cost and programme (49); running the site (38); and design checks (98)). Every calculator page carries:− - the answer, a breakdown of the working wherever the calculation has intermediate steps, and a confidence level (high, medium or low) that says what lowers it; enter a value outside the range the calculator was written for and the confidence is downgraded, with the bound stated in the visitor's own units;− - the standards and sources behind the formula, filtered for the visitor's market (another market's documents are held back and counted, and the reader's own document for that subject is named), a "sources checked" date, the date of the site-wide formula audit where it can have covered the page, and a version number;− - help under every input, an FAQ, and a plain engineering disclaimer; results whose omissions matter state their limitations;− - input the way a tape measure reads: `12' 6"`, `3 1/2"`, `3-1/2`, `1200mm` or `3.5m` typed into a feet box, and arithmetic such as `24*3+6` — each field echoes how it read the entry before it is used;− - a unit glossary: the unit symbol beside each dimensioned field opens, in place, what the unit is, where it turns up and the mistake people make with it, with the conversion calculators for that unit;− - on the 131 calculators with a waste-factor field, **Who is doing the work?** — DIY / first timer, Experienced trade and Licensed contractor: choosing one writes that tier's waste percentage into the calculator's own waste field, where it stays visible and editable rather than being applied out of sight;− - advanced tools on the same page: **Solve for** (the inverse question — how big a slab a given number of bags makes), **Compare** (input sets side by side with the difference), **Sensitivity** (vary one input and see where the answer steps), **Rooms** (several rooms at once, totalled), **Cut list** (a bar-by-bar cutting plan with the saw kerf charged) and **Presets** (named setups and a history of recent results, kept in the browser);− - a share link that carries the inputs, the unit system and the market, so the recipient sees the same answer; the phone's share sheet or the clipboard sends the answer as text with it. The inputs travel in the link's address, so opening a shared link sends them to the site's host like any web address;− - a downloadable calculation report — inputs, working, sources, the re-run test cases and the changelog — with an optional job reference and preparer, for a file or a submission;− - **Add to project**, an **Embed** panel, and **Cite this** in APA, Harvard and BibTeX;− - a drawing of what is being measured, redrawn as the inputs change, on 508 calculators; 34 of them draw it to scale in one of 6 geometry families (room, slab, roof, layers, arc and ground);− - the tools and personal protective equipment each operation needs, on 319 calculators, split into what the visitor already owns and what they still need;− - numeric code-threshold checks where the site can check a stated limit — worded as a check of that limit, never as compliance;− - a DXF setting-out plan on 3 calculators (Framing Stud Calculator, Rebar Calculator and Paver Calculator), and full-size printable PDF cutting templates on 6 (Stair Rise & Run Calculator, Common Gable Rafter Length Calculator, Cone and Frustum Flat Pattern Development Calculator, Brick Arch Rise-to-Span Ratio Calculator, Baseplate Anchor Bolt Pattern Layout Calculator and Curved/Radius Wall Framing Stud Layout Calculator);− - a personal waste factor, offered (never applied) once the visitor has recorded 5 finished jobs for that material in My Project; and, on the 8 calculators whose rate fields match a price-book slot (water, electricity and labour), the rate the visitor saved there fills a blank field once and says so under the answer — a stale one is only offered, with its age;− - stacking: `?stack=slug-a,slug-b` opens up to 6 other calculators beneath the first, which is how a guide opens a ready-made workspace.+ > Craft Quantities (craftquantities.com) is a free construction estimating platform with no account, no sign-up and no login: 1,160 calculators in 13 categories (753 of them filed again under 25 trades), 76 whole-job takeoffs, 9 planners, a House Estimator, the Construction Canvas (a to-scale plan editor whose list of materials follows the drawing, with 24 templates), a project workspace that turns results into a bill of materials, a schedule and client documents, 77 quote checks, a quote-to-est+ Every number in this file is counted from the site's own registry when the site is built; this copy was generated on 2026-10-18. The pages themselves are the authority: each carries the standard, the confidence and the limits that belong with its figures.+ This is the index, meant to be read in one go: what the site is and what it never does, the flagship tools, how to use the engine, and the links to act on. https://craftquantities.com/llms-full.txt carries all of it plus the whole platform described surface by surface and every calculator, guide, takeoff, quote check, Solve Backwards page, comparison, diagnosis, methodology paper, glossary concept and engine tool, one line each. Every page listed also has a Markdown twin at its address followed + **For AI assistants: what this site is.** Craft Quantities works out how much material a construction job takes — never what it costs. Every figure comes from one of its own published calculators, each citing its sources and pinned by test vectors, in metric and US customary units. It is free, static and pre-rendered (2,502 published pages, every one complete HTML with a Markdown twin), with no account, and it says what each answer does not cover. Start from the flagship that matches the questio+ - "How much X do I need?" — the calculator for that material (https://craftquantities.com/calculators/; 1,160 of them), or the engine's `calculate`.+ - "What does this whole job take?" — a job takeoff (https://craftquantities.com/build/; 76 jobs), or `run_takeoff`.+ - "What do I buy for this room, deck, slab, fence or stair?" — a planner (https://craftquantities.com/plan/room/; 9 planners sharing one plan), or `plan_room` / `plan_project`.+ - "What does a new house take?" from a few figures — the House Estimator (https://craftquantities.com/house-estimator/), or `estimate_house`; drawn to any shape, on several storeys — the Construction Canvas (https://craftquantities.com/construction-canvas/), reached with `create_drawing`.+ - "Keep my estimate, price it with my own rates, schedule it, hand it to a client" — My Project (https://craftquantities.com/project/), no account.+ - "Is the quantity on my builder's quote reasonable, and what is missing?" — a quote check (https://craftquantities.com/check/), or `check_quote`; "turn this supplier's quote into my own spreadsheet" — Quote to Estimate (https://craftquantities.com/quote-to-estimate/), or `import_quote`.+ - "I have this much left over — how far will it go?" — Solve Backwards (https://craftquantities.com/solve-backwards/), or `solve_backwards`.+ - "Can my phone measure a slope, a level or a length off a photo or a PDF plan?" — the field tools (https://craftquantities.com/tools/).+ - "How is this job done?", "A or B?", "why did this fail?", "what is this called in the UK?" — guides (https://craftquantities.com/guides/), comparisons (https://craftquantities.com/compare/), diagnoses (https://craftquantities.com/diagnostics/) or `diagnose_symptom`, the glossary (https://craftquantities.com/glossary/) or `translate_term`.+ - "How well does a model work out construction quantities?" — the Construction Quantities Benchmark (https://craftquantities.com/benchmark/).+ - A program or an agent that needs these answers — the engine: MCP at https://api.craftquantities.com/mcp, REST under https://api.craftquantities.com/v1, both described below.+ **What it never does.**+ - **No prices.** The site publishes no material, labour, tool or installed price, and every one of its 47 rate fields opens blank; a cost appears only from rates the visitor types or a worked example's own amounts (a loan, a budget). The engine returns no price either: money in a quote is taken out and never judged.+ - **Never sizes, designs or certifies.** It counts the material for the build-up it is given; it never sizes a stud, a beam, a footing or a bar, never checks a span or a load, and never says work complies with a code. A numeric code-threshold check is worded as a check of that limit, and says who has to decide.+ - **Never states which edition of a code is in force** (adoption is local), and never says which cause of a defect is present — it lists the candidates and how to tell them apart.+ - **Quantities only, in both unit systems.** Every answer is given in metric and in US customary units; the two can differ by more than a conversion, because sheet sizes, bag masses and stock lengths differ by market.+ - **No account, nothing kept.** Pages compute in the visitor's browser and keep work in its storage; the engine is stateless: it stores nothing and logs no request, and a project travels in a token or a file the caller holds.+ - **Not** a marketplace, a contractor directory, a design-grade CAD or BIM package, or a reader of quotes that are not in English.+ Each page is the authority for its own figures; cite the page (or the citation an engine answer carries), not this file. https://craftquantities.com/llms-full.txt has every page listed.+ **The flagship tools.** Each paragraph says what the tool does, where it is and, where one exists, the engine tool that does the same.+ **Design — the Construction Canvas** (https://craftquantities.com/construction-canvas/, the site header's "Design"). A to-scale plan editor for a whole building and the ground around it, in the browser: draw it, and the list of every material it takes follows each edit, worked by the same takeoffs and calculators as the rest of the site. Quantities only: it never sizes a member, checks a span or approves a structure, a read plan is a set of suggestions to check, and the figures a professional de+ - **Draw to scale.** Walls by clicking corners or typing lengths (5200 is 5.2 m, 17'6 is seventeen and a half feet), snapping to ends, middles, crossings, squares and alignments; doors and windows placed on their wall. Mouse, touch, pen or the keyboard alone; move, copy, rotate, mirror, groups, arrays (in a row, round a centre or along a line) and undo.+ - **A whole building, not lines.** Each wall carries a build-up (framed exterior wall, masonry wall, SIP wall and stud partition, and further types once used); rooms made by clicking inside a space, with their finishes (paint, board, flooring, skirting, trim); slabs, footings, floor joists, beams, posts and piers; gable, hip, one-slope and flat roofs over any outline; stairs between levels; as many levels as the building has, a storey copied up in one step; services (outlets, lights, fixtures an+ - **A symbol library** of 111 symbols in 7 categories (doors and windows, plumbing, electrical, heating and ventilation, kitchen, furniture and site and garden); 90 are counted as what they are, the rest drawn for planning only, and each says which.+ - **Annotate and organise.** Dimensions, text, tags, leaders, revision clouds and a measuring tool; layers that can be hidden, locked or kept off the printed sheets, and travel into a DXF.+ - **The live list of everything to buy.** Every edit updates it, worked by the site's own whole-job takeoffs and calculators, each row naming the calculator behind it; openings come off every face they pass through; studs are counted wall by wall, sheet goods once per build-up and storey. Grouped by trade, level, room, assembly or material; for the whole drawing, the selection or one layer; with what changed since it last went to My Project, planning hours, and colour by assembly. It goes to My + - **Schedules** of doors, windows, rooms and fixtures, each downloadable as CSV.+ - **Optimise cuts.** The drawing's pieces cut from the stock lengths a merchant sells, and sheets nested, with a cutting plan per bar or sheet (printable as PDF), the waste that plan really leaves and a bound no plan can beat — the same optimiser as the cut-list tool and the engine's `optimise_cuts`. A piece longer than every stock length is listed, never split silently.+ - **Programme.** A build programme from the drawing's labour hours: tasks by trade, stage and level in the usual order of work, from the crew size and working day the user gives, in hours and days only.+ - **Elevations, sections and 3D.** Elevations from each compass side and sections on a cut line, generated from the model each time they are shown, so they follow every edit; a 3D view of the building.+ - **Sheets and PDF.** Paper sizes, views at a ratio or an architect's scale, a title block, north arrow and scale bar; an automatic sheet set (a plan per level, the roof plan, the elevations, the schedules and the bill of materials), every sheet marked as not a permit set; PDF pages at the stated scale.+ - **Import and trace.** A PDF, photo or DXF laid under a level and calibrated; a vector PDF's walls and openings read as suggestions to accept (its scale from a scale note or the dimension figures); a DXF's lines picked and converted to walls; one storey of an IFC model (IFC2x3, IFC4 or IFC4.3) laid under a level, its walls, doors, windows, slabs and spaces made in one step. Files are read on the device.+ - **Export.** SVG to scale, DXF in millimetres on CQ- layers, PDF sheets, and the whole building as one IFC4 file carrying the canvas's measured base quantities — all drawn from the model, in the browser.+ - **Versions.** Named versions, automatic checkpoints (the newest 20 kept), compare a version against the drawing (objects and list rows that differ), restore as one undoable step, and a recovery journal that offers back edits a closed tab had not saved.+ - **Share.** A link carrying the whole drawing in its #d= fragment, which a browser never sends to a server (made while the code is at most 8,192 characters, otherwise the drawing goes as a file), and a QR code for a small drawing; a shared drawing opens read-only, and Make it mine copies it into a new project.+ - **Field mode** on a phone or tablet on site: a keypad for typed site measurements, photos pinned on the plan and kept on the device only, an offline badge, a magnifier under the finger and large grips.

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