12×16 room: paint by wall height
| Wall height | Paintable sq ft | Gallons (2 coats) | Buy |
|---|---|---|---|
| 8 ft | 398 | 2.27 | 3 |
| 9 ft | 454 | 2.59 | 3 |
| 10 ft | 510 | 2.91 | 3 |
1 door and 2 windows deducted; 350 sq ft per gallon.
Worked example
Perimeter: 2 × (12 + 16) = 56 ft. With 8 ft walls: 448 sq ft, minus 20 (door) and 30 (two windows) = 398 sq ft. Two coats: 796 ÷ 350 = 2.27 gallons. The ceiling adds 192 sq ft per coat (about 1.10 gallons for two coats).
Frequently asked questions
How many gallons to paint a 12×16 room?
About 2.27 gallons for two coats on 8 ft walls (buy 3).