About DIY Build Calc
DIY Build Calc is a free collection of home improvement calculators for homeowners, renters and weekend DIYers who want to buy the right amount of material the first time.
Running out of tile halfway through a floor, or returning a dozen unused bags of concrete, wastes time and money. Our calculators turn tape-measure numbers into clear material estimates. They're quick to use on a phone in the aisle of a home improvement store.
What makes these calculators different
- Transparent math. Every result includes the step-by-step calculation, so you can see how it was reached.
- Stated assumptions. Coverage rates, bag yields, densities and waste factors are listed on every page and can be adjusted.
- Free and private. No accounts and no sign-ups. Calculations run entirely in your browser, and your measurements are never sent to a server.
Our calculators
- Paint Calculator
- Flooring Calculator
- Concrete Calculator
- Mulch Calculator
- Gravel Calculator
- Tile Calculator
- Drywall Calculator
- Square Footage Calculator
A note on accuracy
The calculators use standard industry formulas and typical product figures. Real-world needs vary with product, surface, site conditions and installation method. Treat results as planning estimates, check them against your product's label or your supplier, and follow local building codes for structural work.
Spotted a mistake or have an idea for a new calculator? Let us know.