Building materials calculators
Every sheet gives you three numbers: the quantity in the unit the trade uses, the shopping number in bags or loads, and about what it costs at a price you can change to the one you were quoted. Measurements in feet and inches or meters. Nothing to sign up for.
The pad · 25 calculatorsFigures checked 2026-09-04
Yard and landscape
Sold by the cubic yard or the ton- 01Gravel calculatorcubic yards, tons at 1.4 tons per yard, bags of 0.5 cu ft, and an estimated cost from a price you can edit.sq ft · cu yd · tons · cost
- 02Mulch calculatorcubic yards, how many 2 cu ft or 3 cu ft bags, and the cost at a bulk or bagged price you can edit. Default depth 3 inches.sq ft · cu yd · tons · cost
- 03Topsoil calculatorcubic yards, tons at 1.1 tons per yard, 40 lb bags, and an estimated cost from prices you can edit.sq ft · cu yd · tons · cost
- 04Sand calculatorcubic yards, tons at 1.35 tons per yard, 50 lb bags, and the cost at prices you can edit.sq ft · cu yd · tons · cost
- 05Crushed stone calculatortons at 1.5 tons per yard, cubic yards, bags and cost from prices you can edit.sq ft · cu yd · tons · cost
Concrete and paving
Bags, ready-mix and hot mix- 01Asphalt calculatorHow many tons of hot-mix asphalt for a driveway or lot at 145 lb per cubic foot compacted, the cubic yards, and the cost at a per-ton price you can edit. Default thickness 3 inches.sq ft · cu yd · tons · cost
- 02Concrete calculatorcubic yards for a ready-mix order, how many 80, 60, 50 or 40 lb bags at the manufacturer's yields, and the cost at prices you can edit.cu ft · cu yd · tons · cost
Floors, walls and roofs
Sold by the box, roll or square- 01Paver calculatorHow many pavers for a patio or walkway from the paver size, plus the crushed-stone base, the bedding sand, polymeric joint sand and the cost.sq ft · ea · cu yd · cost
- 02Tile calculatorHow many tiles and boxes for a floor or wall from the tile size, with the waste allowance, bags of thinset and grout, and the cost.sq ft · ea · boxes · cost
- 03Paint calculatorwall area with doors and windows deducted, gallons at 350 sq ft per gallon per coat, ceiling and primer as separate lines, and the cost.sq ft · gal · cost
- 04Sod calculatorsquare feet with waste, rolls of 10 sq ft, pallets, and the cost at a per-square-foot price you can edit.sq ft · rolls · cost
- 05Flooring calculatorsquare feet with a waste allowance, boxes at the coverage printed on the box, underlayment rolls, and the cost.sq ft · boxes · rolls · cost
- 06Insulation calculatorsquare feet with waste, packages at the coverage printed on the bag, and the cost.sq ft · bags · cost
- 07Siding calculatorwall area with a waste allowance, squares of 100 sq ft, and the cost at a per-square price you can edit.sq ft · squares · cost
- 08Wallpaper calculatorwall area from the room size and height, a pattern-repeat allowance, usable coverage per roll, and the cost.sq ft · rolls · cost
Framing and structure
Boards, sheets and fasteners- 01Drywall calculatorHow many sheets of drywall for a room, with joint compound, tape and screws, from the wall and ceiling area and the sheet size you are using.sq ft · sheets · buckets · cost
- 02Roofing calculatorthe footprint and the pitch give the roof area, then bundles, underlayment, ridge cap and the cost.sq ft · squares · bundles · cost
- 03Fence calculatorHow many posts, rails, pickets and bags of concrete for a wood fence, from the run length, post spacing and picket width, with the cost.ea · bags · cost
- 04Deck calculatorfrom the size, board width and joist spacing, with fasteners and the cost.sq ft · ea · ft · cost
- 05Stair calculatorFrom the total rise, get the number of steps, the exact riser height, the total run, the stringer length and the lumber to buy, with the 7¾ in riser and 10 in tread limits of the residential code shown.ea · in · cost
- 06Board foot calculator1 in × 12 in × 12 in.bd ft · cost
Measuring and converting
Area, volume and units- 01Square footage calculatorAdd up the square footage of a room, a lot or an odd-shaped area from rectangles, a circle and a triangle, with a cost per square foot if you want one.sq ft · ea · acres
- 02Cubic yard calculatorConvert length, width and depth to cubic yards and cubic feet, then to tons at a density you set and to a cost at a price per cubic yard.sq ft · cu ft · cu yd · cost
- 03Square feet to acres calculatorConvert square feet to acres, or a lot's length and width straight to acres, hectares and square meters. One acre is 43,560 square feet.sq ft · acres · ea
- 04Pool volume calculatorHow many gallons your pool holds from its shape, length, width and shallow and deep depths, plus the cost to fill it at your water rate.sq ft · ft · cu ft · cost
Project guides
All 8 guidesWhy bags and dollars, not just cubic yards
The standard answer to “how much gravel do I need” is a volume in cubic yards. That is the right number for a supplier and a useless one in a store aisle, where the material comes in half-cubic-foot bags. Every sheet here prints both, plus the weight in tons for the delivery, and what it comes to at a price you control.
The figures are estimates
Densities, coverages and yields vary with moisture, compaction, product and how carefully you work. Each sheet shows the figure it used and lets you change it, and prints where the figure came from. Order a little extra: a second delivery costs more than the material you did not need. See how it works for the whole method. A German edition in metres, kilograms and German trade practice is at /de.