Project guides

Step-by-step guides with formulas and worked examples for common material estimates.

How Much Concrete Do I Need?

Find out how much concrete you need for a slab, footing, or column. Includes the formula, a worked example, and waste guidance.

Calculate how many 40, 60, or 80 lb bags of concrete you need, with yields per bag and a worked example.

Estimate gravel for a driveway or path by area and depth, with cubic-yard and ton conversions.

Estimate mulch by bed area and depth, with bag and cubic-yard conversions.

Estimate topsoil by area and depth, with bag and cubic-yard conversions for lawns and gardens.

Estimate asphalt for a driveway by area and depth, with ton conversions.

Estimate pavers for a patio or walkway by area and paver size, including waste.

Estimate drywall sheets for walls and ceilings, with 4×8 and 4×12 sheet coverage.

Estimate siding squares for your home's walls, including openings and waste.

Estimate roofing squares and shingle bundles from your roof footprint and pitch.