About Supplysum

Supplysum helps homeowners and DIYers work out how much material to buy for common projects: concrete, brick and block, gravel, mulch, sod, paint, flooring, tile, drywall, wallpaper, roofing, fencing, decking and stairs.

Every calculator shows its formula and a worked example, supports feet and inches or metric, and includes a waste allowance. Cost estimates use rough US average prices that you can edit to match local quotes.

The results are estimates for planning and shopping. They do not replace a contractor's takeoff, engineering, or your local building code.