Free, fast material and project calculators for builders, landscapers and DIYers—estimate quantities and cost in seconds.
Supply Calculator is a free collection of material and project calculators for contractors, landscapers and do-it-yourselfers. Each tool turns simple measurements into the quantities you actually need to order—cubic yards of gravel, tons of stone, sheets of drywall, squares of shingles, deck boards, gallons of paint and more—with a quick cost estimate. Add several areas to total a whole job at once, switch units on any field, and save or share your estimate. Figures are planning estimates; always confirm coverage, density and pricing with your supplier.
Pick a calculator based on the unit your supplier uses. Use square footage tools for surfaces, linear feet for runs, cubic feet or cubic yards for volume, tons for aggregate, and count-based tools for blocks, pavers, boards or fixtures.
Each calculator is built for quick planning: add multiple areas, switch units beside individual measurements, adjust waste or density, and use the cost fields to compare order options. Save, share and print tools run in your browser so you can keep a job estimate without sending measurements to a server.
For best results, measure each distinct section separately, round up to the way the material is actually sold, and verify coverage rates with the product label or supplier quote before ordering.