Construction calculators
Quantity calculators for ordering materials: cubic yards and bags of concrete, tons of asphalt, kilograms of grout, gallons of water in a pool, and the square footage everything else is priced by. Each one shows the geometry, converts between units, adds a waste allowance and gives a realistic order quantity rather than a bare volume.
Most used
- Concrete calculator
Work out how much concrete you need in cubic yards, cubic metres and 40–80 lb bags for a slab, footing or round column, with waste allowance, weight and cost.
Concrete and paving
- Asphalt calculator
Calculate how many tons of hot-mix asphalt you need from the area and compacted thickness, with a waste allowance and material cost, plus a thickness guide for driveways, lots and overlays.
- Concrete calculator
Work out how much concrete you need in cubic yards, cubic metres and 40–80 lb bags for a slab, footing or round column, with waste allowance, weight and cost.
Tiling and flooring
- Grout calculator
Calculate the kilograms or pounds of grout for a tiling job from the area, tile size, joint width and depth, with waste, bag count, and a comparison across common tile sizes.
- Square footage calculator
Calculate the square footage or square metres of a room, floor, wall, yard or lot for any common shape, add waste, and see how many boxes of flooring, tile, gallons of paint or yards of sod you need.
Pools and water
- Pool volume calculator
Find how many gallons or litres your pool holds for rectangular, round, oval and freeform shapes with a shallow and deep end, then the fill time, pump turnover, and chlorine, shock, alkalinity and salt doses for that volume.
Questions about these calculators
How much waste should I add?
Five to ten percent for concrete and flooring on a prepared base, more for rough excavation or diagonal layouts. The default on each calculator is a sensible figure you can change.
Do the calculators give bags or cubic yards?
Both, plus metric. Concrete shows cubic yards, cubic metres and bags of four sizes; grout shows kilograms and bags; asphalt shows US tons and tonnes.
Are the prices current?
Prices are fields you fill in; the defaults are typical 2025–2026 US figures. Enter a local quote for an accurate cost.