Free · No sign-up · Works on your phone
Know exactly how much to buy before you drive to the store.
Material calculators for concrete, gravel, decks, flooring, tile, mulch, drywall and roofing — with the waste factors, bag sizes and formulas the pros use.
Concrete & Masonry
View all concrete & masonry calculatorsLandscaping & Garden
View all landscaping & garden calculatorsFlooring & Walls
View all flooring & walls calculatorsRoofing & Decks
View all roofing & decks calculatorsBuilt for the aisle, not the classroom
Every calculator answers the question you’ll be asked at the counter — how many bags, tons, boxes or bundles — and shows the formula so you can check it.
Real-world units
40/60/80 lb bags, tons and cubic yards, boxes, bundles and sheets — not just volume.
Waste built in
Sensible defaults for waste, compaction and pattern cuts, with the reasoning explained.
Transparent math
Formulas, worked examples and a linked Sources & assumptions section on every calculator.
Fast on any phone
Runs entirely in your browser. No account, no tracking of what you enter.