About AllUnits.io
AllUnits.io turns your measurements into a materials list. Enter the dimensions of your slab, fence, deck, or lawn; get what to buy — bags, boards, yards, and tons — with the math shown and every factor cited.
What the site is
Two tools in one:
- 18 project calculators across three clusters — Concrete & Masonry, Landscaping, and Decks & Lumber. Each one outputs a materials list you can print, copy, or take to the store, states its method in plain language, and links its sources.
- A unit reference — 28 converters for length, weight, temperature, volume, cooking, pressure, currency, and more, for when you just need the number.
Where the numbers come from
No factor on this site is invented or copied from another calculator. Calculator math uses manufacturer data sheets, building codes, and trade standards:
- Quikrete technical data sheets — concrete bag yields, mortar coverage, and post-setting practice.
- ICPI (now CMHA) Tech Specs — paver base and bedding layers.
- IRC 2021 — stair riser and tread limits, stud spacing.
- NIST PS 20 — lumber sizes and the board-foot convention.
- University turf programs (Michigan State, Cornell) — grass seeding rates.
Converter factors follow the primary metrology sources: the BIPM SI Brochure, NIST SP 811 (inch = 25.4 mm exactly, pound = 0.45359237 kg exactly), and IEC/ISO 80000 for digital prefixes. Currency rates come from a public mid-market API — confirm with your bank before moving money. Every source, with links, is on the Sources & Methods page. Figures that are typical rather than standardized — aggregate densities, sod pallet sizes — are labeled that way on the page, and your supplier's numbers govern.
Who builds it
AllUnits.io is operated by BT Enterprises, a small independent web publisher. The site is built and maintained by Bryan Telford. Questions, corrections, or calculator requests are welcome at support@allunits.io or via the feedback form. Corrections are taken seriously — a wrong yield number means a wrong purchase, so reports of bad math get fixed first.
Planning, not engineering
Every calculator here estimates materials for planning and purchasing. None of them size structures: no joist spans, no footing loads, no wall engineering. Where a tool touches code territory — stairs, retaining walls, stud spacing — it cites the code section and tells you when a permit office or engineer has the final word. Confirm structural work with your local building department.
Privacy & ads
No account, no tracking of who uses which tool, and calculator inputs never leave your browser — the math runs client-side. The site is supported by minimal display advertising; no interstitials or popups, and no ads inside embedded calculators.