Answer
How much paint do I need for a room?
Measure the wall area (perimeter × height, less doors and windows) and divide by about 350 sq ft per gallon per coat: a 12 × 14 ft room with 8 ft ceilings needs about 2.1 gallons for two coats.
Gallons by room size
| Room | Wall area | Gallons | Buy |
|---|---|---|---|
| 10 × 10 ft | 269 sq ft | 1.5 | 2 gal |
| 10 × 12 ft | 301 sq ft | 1.7 | 2 gal |
| 12 × 12 ft | 333 sq ft | 1.9 | 2 gal |
| 12 × 14 ft | 365 sq ft | 2.1 | 2 gal + 1 qt |
| 14 × 16 ft | 429 sq ft | 2.5 | 2 gal + 2 qt |
| 16 × 20 ft | 525 sq ft | 3 | 3 gal |
Step by step
- Add the lengths of all walls to get the perimeter.
- Multiply by the ceiling height.
- Subtract about 21 sq ft per door and 15 sq ft per window.
- Multiply by the number of coats and divide by 350.
More questions
Is one gallon enough for a bedroom?
One gallon covers one coat in a typical 10 × 12 ft bedroom; for two coats, buy two.
How much for trim?
A quart usually covers the trim, doors and baseboards of an average room.
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