How much paint for a 20x22 room?
A 20x22 ft room has about 636 sq ft of wall after subtracting one door and one window. For two coats you need roughly 3.6 gallons.
For 2 coats, walls, 8 ft ceiling
3.6 gallons (~4 cans)
About 636 sq ft of paintable wall.
Calculate your exact amount
Adjust the height, coats, doors and windows for your room:
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Paint needed for a 20x22 room (chart)
| Ceiling height | 1 coat | 2 coats | 3 coats |
|---|---|---|---|
| 8 ft | 1.8 gal | 3.6 gal | 5.5 gal |
| 9 ft | 2.1 gal | 4.1 gal | 6.2 gal |
| 10 ft | 2.3 gal | 4.6 gal | 6.9 gal |
Based on ~350 sq ft per gallon per coat, minus one door and one window.
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Shop interior paint →How we calculated this
- Wall area = 2 × (length + width) × height = 2 × (20 + 22) × 8 = 672 sq ft.
- Minus one door (21 sq ft) and one window (15 sq ft) = 636 sq ft.
- × 2 coats ÷ 350 sq ft per gallon = 3.6 gallons.
Frequently asked questions
- How many gallons of paint for a 20x22 room?
- About 3.6 gallons for two coats of walls with 8 ft ceilings, or 1.8 gallons for a single coat.
- How much paint do I need for a 20x22 room with high ceilings?
- Use the chart above — a 10 ft ceiling raises it to about 4.6 gallons for two coats.