Keep units consistent.
Room dimensions use feet. Material depth uses inches. Don’t enter 6 inches as 6 feet.
HOME PROJECT CALCULATORS / THE EVERYDAY TOOLBOX
Get the numbers.
Get on with it.
Paint for a room. Mulch for a bed. Flooring by the box. Practical project math, with the assumptions where you can see them.
Pick your project.
5 calculators
INSIDE THE HOME
Paint calculator
Estimate paint for rectangular room walls, allowing for openings, coats and product coverage.
Open calculator ↗OUTDOOR & BUILDINGMulch & gravel calculator
Convert a rectangular bed’s measurements into cubic yards and bags.
Open calculator ↗OUTDOOR & BUILDINGConcrete volume calculator
Estimate rectangular slab volume and bag count using your product’s stated yield.
Open calculator ↗INSIDE THE HOMEFlooring calculator
Calculate room area, whole boxes and estimated material cost.
Open calculator ↗PROJECT PLANNINGProject budget calculator
Combine known costs and a contingency allowance without hiding the assumptions.
Open calculator ↗No calculator matches that search. Try “paint”, “mulch”, “concrete”, “flooring” or “budget”.
BEFORE YOU HIT CALCULATE
A useful estimate starts
with a useful measurement.
Use the product label.
Paint coverage, bag yield and box coverage vary. Replace the sample values with your product’s specifications.
Make room for reality.
Choose an extra allowance for cuts, waste or uneven surfaces. The example allowance is editable.
KEEP THESE HANDY
Small conversions.
Big difference.
- 12 inches
- 1 foot
- 9 square feet
- 1 square yard
- 27 cubic feet
- 1 cubic yard
- Square ≠ cubic
- Area uses two dimensions. Volume includes depth.
Take the estimate with you.
Every calculator shows its formula and downloads a plain-text estimate. No account needed. Your inputs stay in this page.
Read the measuring guide →