Paint Calculator
Enter your room size and get an instant estimate for gallons, quarts, and material cost.
Paint needed — gallons
Paintable area —
Quarts (alternative) —
Est. paint cost —
Based on 350 sq ft coverage per gallon at 2 coats. Premium paints may cover 300 sq ft/gal.
How to use this calculator
- Measure your room's length and width in feet
- Enter wall height (standard is 8 ft)
- Count doors (we deduct 21 sq ft each) and windows (15 sq ft each)
- Select number of coats — most projects need 2
Coverage assumptions
This calculator assumes 350 square feet per gallon for one coat with standard interior latex paint. Premium paints may cover less (~300 sq ft/gal); primer may cover more (~400 sq ft/gal).