10×10 room: paint by wall height
| Wall height | Paintable sq ft | Gallons (2 coats) | Buy |
|---|---|---|---|
| 8 ft | 270 | 1.54 | 2 |
| 9 ft | 310 | 1.77 | 2 |
| 10 ft | 350 | 2.00 | 2 |
1 door and 2 windows deducted; 350 sq ft per gallon.
Worked example
Perimeter: 2 × (10 + 10) = 40 ft. With 8 ft walls: 320 sq ft, minus 20 (door) and 30 (two windows) = 270 sq ft. Two coats: 540 ÷ 350 = 1.54 gallons. The ceiling adds 100 sq ft per coat (about 0.57 gallons for two coats).
Frequently asked questions
How many gallons to paint a 10×10 room?
About 1.54 gallons for two coats on 8 ft walls (buy 2).