18 free calculators for the questions that come up on a job: how many yards to order, how many bags to buy, how many steps to cut. Every page shows its formula, a worked example and the sources behind its numbers.
Free calculators for concrete, landscaping and home projects
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Popular calculators
- Concrete CalculatorCubic yards and bags for slabs, footings, walls and columns.
- Square Footage CalculatorSquare feet of rooms, homes and lots, with cost.
- Gravel CalculatorYards and tons of gravel for driveways, paths and bases.
- Cubic Yard CalculatorCubic yards from any dimensions, with tons.
- Mulch CalculatorYards of mulch or number of bags for garden beds.
- Stair CalculatorRisers, treads, run and stringer length with code checks.
Concrete & Masonry
See allLandscaping & Paving
See all- Gravel CalculatorYards and tons of gravel for driveways, paths and bases.
- Sand CalculatorYards, tons and bags of sand for pavers and sandboxes.
- Dirt CalculatorFill dirt in cubic yards and tons, with settling allowance.
- Topsoil CalculatorYards, bags and tons of topsoil for lawns and beds.
- Mulch CalculatorYards of mulch or number of bags for garden beds.
- Asphalt CalculatorTons of asphalt for driveways and lots.
Area & Volume
See all- Square Footage CalculatorSquare feet of rooms, homes and lots, with cost.
- Square Yard CalculatorSquare yards for carpet, sod and paving.
- Linear Feet CalculatorLinear feet from pieces or from an area to cover.
- Cubic Yard CalculatorCubic yards from any dimensions, with tons.
- Cubic Feet CalculatorCubic feet of boxes and cylinders, with gallons.
Carpentry & Roofing
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Formulas on the page
Each calculator writes out the math it uses, so you can check it by hand.
Sourced constants
Bag yields, weights and code limits come from data sheets, standards and building departments, linked on every page.
Tested code
The same tested functions power the calculator and the worked examples. How we test.
Private by design
Calculations run in your browser. The numbers you type aren't sent anywhere.