Construction and landscaping calculators
Each calculator shows a worked default example, the formula behind it, and what to order. All of them run in your browser; nothing you type is sent anywhere.
Concrete, gravel, mulch, and soil by the cubic yard
Bulk materials share one question: how many cubic yards, and how many bags?
- Concrete CalculatorSlab volume in cubic feet, cubic yards, and cubic meters, with ready-mix order size and bag counts for documented products.
- Gravel CalculatorGravel, crushed rock, or landscape rock volume in cubic yards and meters, with an optional weight from your supplier's density.
- Mulch CalculatorMulch volume in cubic yards for any bed, plus a whole-bag count for the bag size you are buying.
- Topsoil CalculatorTopsoil volume in cubic yards and meters for lawns, beds, and fill, with an optional weight from your supplier's density.
Roofing, paint, drywall, and decks
Slope, coverage, and sheet or board counts.
- Roof Pitch CalculatorPitch as x/12, roof angle in degrees, slope percentage, and the sloped length for a given horizontal run.
- Paint CalculatorGallons or liters of paint for your walls and number of coats, using the coverage printed on your paint's label.
- Deck CalculatorDecking board count from deck size, actual board width, gap, and board length, with the cutting assumptions shown.
- Drywall CalculatorDrywall sheet count for walls and ceilings from room dimensions or total area, minus openings, by sheet size.
- Roofing CalculatorRoof area, roofing squares, and shingle bundles from a footprint and pitch, using the coverage on your shingle wrapper.