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How Much Paint Do You Need? Find Out in Seconds.
Free home improvement calculators and guides for US homeowners and DIYers. Figure out exactly how much paint, flooring, tile, concrete, fencing, mulch, wallpaper, and drywall you need — no guesswork, no wasted material. Enter your room below — get exact gallons, liters, and cost instantly.
10% is a safe default — covers spills, roller absorption, and future touch-ups.
Your paint estimate
Buy this much
2 gals
1.95 gal · 7.4 L exact
- Wall area
- 384 sq ft
- Minus doors & windows
- −51 sq ft
- Paintable area × 2 coats
- 666 sq ft
- With 10% waste
- 733 sq ft
Rounded up to the nearest quart — paint is sold in gallons and quarts, so you never come up short mid-wall.
Home Improvement Calculators
Eight pro-grade DIY calculators — paint, wallpaper, flooring, tile, concrete, fencing, mulch, and drywall. All free, all instant.
Why HomeMeasure Pro?
Pro-grade formulas
Our math follows the same method professional painters use: true wall area, minus doors and windows, times coats, plus a realistic waste allowance — not a rough guess.
Built for US homes
Feet, gallons, quarts, and dollars — plus liter conversions for imported paints. No metric-only tools, no confusing units.
Fast & free forever
Instant results as you type, mobile-friendly, no account, no paywall. Supported by ads so the calculators stay free.