Reference data
The tables behind the calculators
The same numbers the tools run on, published plainly so you can read them without filling in a form — each with its source, the date it was checked, and permission to quote it.
17 tables · Last reviewed 2026-09-16
- Concrete bag yieldCubic feet of set concrete per bag, and bags per cubic yard, by bag weight.Answers: How many bags of concrete make a cubic yard?Checked 2026-09-16
- Aggregate weightsPounds and tons per cubic yard for stone, sand, DG and topsoil — as a range, not a single figure.Answers: How much does a yard of gravel weigh?Checked 2026-09-16
- Drywall levels of finishWhat each of the five levels includes, what it is suitable for, and how much compound and labour it takes.Answers: What is the difference between a Level 4 and a Level 5 drywall finish?Checked 2026-09-16
- Mulch coverage and bag countsSquare feet a cubic yard covers at every depth, bags to a yard and to a pallet, and what each mulch weighs dry and soaked.Answers: How many bags of mulch are in a cubic yard, and how much does a yard cover?Checked 2026-09-16
- Asphalt tonnage and coverageSquare feet and square yards a ton of asphalt covers at every compacted depth, the spread rate behind it, and millings against hot mix.Answers: How much does a ton of asphalt cover, and how do I convert square yards to tons?Checked 2026-09-16
- Sod pallets and seeding ratesWhat a pallet of sod covers and weighs, and how many pounds of seed per thousand square feet each grass actually wants.Answers: How many pieces of sod are in a pallet, and how much grass seed do I need?Checked 2026-09-16
- Deck spans and spacingHow far each joist size spans by spacing and species, what spacing each decking material allows, and the gaps a guard has to close.Answers: How far can a deck joist span, and how far apart do the joists go?Checked 2026-09-16
- Thinset and grout coverageSquare feet per bag of mortar for every trowel notch, and pounds of grout per square foot for every tile size and joint width.Answers: How much thinset and grout do I need per square foot?Checked 2026-09-16
- Gutter sizing by rainfallDesign rainfall intensity for every state, and the roof area each gutter and downspout size can carry there.Answers: What size gutter do I need for my rainfall?Checked 2026-09-16
- Paint coverage by surfaceWhat a gallon really covers on each substrate, first coat and later coats, against the figure printed on the tin.Answers: How many square feet does a gallon of paint cover?Checked 2026-09-16
- Fence post depth and frost lineDesign frost depth for all 51 states, and the post hole depth it calls for at each fence height.Answers: How deep do fence posts need to be in my state?Checked 2026-09-16
- Water heater sizingTank size and first hour rating by household, and the flow a tankless unit delivers at each climate's temperature rise.Answers: What size water heater do I need for my household?Checked 2026-09-16
- Heating and cooling load by climate zoneScreening BTU per square foot for each of the eight climate zones, and what it works out to in tons for common house sizes.Answers: How many BTU per square foot do I need in my climate?Checked 2026-09-16
- Roof pitch, angle and multiplierEvery pitch from 1:12 to 18:12 as an angle in degrees and as the factor that turns footprint into roof area.Answers: What is the area multiplier for a 6:12 roof pitch?Checked 2026-09-16
- Regional price indexThe labour factor applied to estimates in each of the 51 states, and the federal series it comes from.Answers: How much more does construction labour cost in my state?Checked 2026-09-16
- Area and volume conversionsSquare feet to square yards, metres and acres; cubic feet to cubic yards and metres — with the definition each one follows from.Answers: How many square feet are in a square yard, a square metre and an acre?Checked 2026-09-16
- Control joint spacingHow far apart to cut joints in a slab, how deep, and how soon after the pour.Answers: How far apart should control joints be in a concrete slab?Checked 2026-09-16
Why these exist as pages
A calculator answers one job at a time. Sometimes you do not want an answer — you want the number itself, to check the one a supplier gave you, to settle an argument, or to put in a spec. That is what these are for.
They are not a transcription. Each table is rendered from the exact same data structure the calculators compute with, so a figure cannot be right on one page and stale on the other. When a value is re-checked it changes in both at once, and the change goes in the changelog.
Take them
Every table is free to quote or reproduce with attribution, and each carries a ready-made citation line. The one thing we ask is that you take the date with the number. A yield is stable for years; a delivered price is not, and a price quoted without a year is worse than no price at all because it looks authoritative.
What makes a table worth publishing here
It has to be a figure someone would otherwise have to guess at, it has to come from a document we can name, and it has to be one that a calculator on this site actually consumes. Tables that exist only to have a page are how a site fills up with content nobody reads and nothing links to.