Paint for a 20×24 room
3.7 gallons (buy 4 gal)
for two coats on 653 sq ft of wall: 8 ft ceilings, one door, two windows, 350 sq ft per gallon.
Paint for a 20×24 room by ceiling height
| Ceiling height | Wall area | 1 coat | 2 coats |
|---|---|---|---|
| 8 ft | 653 sq ft | 1.9 gal | 3.7 gal |
| 9 ft | 741 sq ft | 2.1 gal | 4.2 gal |
| 10 ft | 829 sq ft | 2.4 gal | 4.7 gal |
| 12 ft | 1,005 sq ft | 2.9 gal | 5.7 gal |
Wall area subtracts one door (21 sq ft) and two windows (15 sq ft each). Ceiling: 480 sq ft, 1.37 gal per coat.
How it’s worked out
- Perimeter: 2 × (24 + 20) = 88 ft.
- Wall area: 88 × 8 ft = 704 sq ft, minus 21 for the door and 30 for the windows = 653 sq ft.
- Two coats: 653 × 2 ÷ 350 = 3.73 gallons.
Change the numbers
Other room sizes
- 18×24 room
- 20×20 room
- 16×24 room
- 24×24 room
- 15×24 room
- 18×20 room
- 14×24 room
- 16×20 room
- 13×24 room
- 15×20 room
- 12×24 room
- 14×20 room
Questions
- How much paint do I need for a 20×24 room?
- About 3.7 gallons for two coats on the walls of a 20×24 room with 8 ft ceilings, one door and two windows: buy 4 gal. The ceiling takes another 1.4 gallons per coat.
- How many square feet of wall is a 20×24 room?
- 704 sq ft of wall with 8 ft ceilings, or about 653 sq ft after one door and two windows.
- How much does it cost to paint a 20×24 room?
- Paint for the walls costs about $160 at $40 a gallon. Professional painters typically charge $2 to $6 per square foot of floor area, about $960 to $2,880 here.