Two coats on 40 m² of wall take 7.3 litres at 11 m² per litre; 400 sq ft with two coats takes 2.0 US gallons at 400 sq ft per gallon.
- 1 coat (L)
- 2 coats (L)
- 3 coats (L)
| Area (m²) | 1 coat (L) | 2 coats (L) | 3 coats (L) |
|---|---|---|---|
| 10 | 0.9 | 1.8 | 2.7 |
| 20 | 1.8 | 3.6 | 5.5 |
| 30 | 2.7 | 5.5 | 8.2 |
| 40 | 3.6 | 7.3 | 10.9 |
| 50 | 4.5 | 9.1 | 13.6 |
| 60 | 5.5 | 10.9 | 16.4 |
| 70 | 6.4 | 12.7 | 19.1 |
| 80 | 7.3 | 14.5 | 21.8 |
| 100 | 9.1 | 18.2 | 27.3 |
| 120 | 10.9 | 21.8 | 32.7 |
How it is computed
Paint = area × coats ÷ spreading rate. Metric rows use 11 m² per litre, imperial rows 400 sq ft per US gallon, the usual figures printed on the can. Subtract doors and windows from the area first.
FAQ
Should I buy extra paint?+
Yes, about 10% more for rough or porous walls and touch-ups. A dark-to-light colour change may need a third coat or a primer.
Does the table include the ceiling?+
Only if you add the ceiling area to the wall area. Look up the total surface you plan to paint.