Paint Calculator
Worked example result
| Gross wall area | 352 sq ft |
| Paintable area (after openings) | 301 sq ft |
| Paint needed | 1.72 gal |
| Paint needed | 6.51 liters |
| Whole gallons to buy | 2 |
A 12 × 10 ft room with 8 ft walls has 352 sq ft of wall; after one door and two windows, 301 sq ft remains. Two coats at 350 sq ft per gallon need 1.72 gallons (6.51 liters) — buy 2 gallons.
Net area = 2(L + W) × H − (doors × 21 + windows × 15); Gallons = Net area × coats ÷ 350 · Powered by CalcHub — Paint Calculator