Accent Wall Paint Calculator
Calculate paint for an accent wall separately from the rest.
Get gallons and cans for each color from wall dimensions and number of coats needed.
Painting an accent wall uses the same coverage math as full-room painting, applied to a single wall. The key is calculating the paintable surface area and accounting for doors, windows, and the number of coats needed.
The formula: Wall Area = Width × Height Paintable Area = Wall Area − Door Areas − Window Areas Gallons Needed = (Paintable Area × Number of Coats) / Coverage per Gallon
Standard paint coverage: 1 gallon covers approximately 350–400 sq ft per coat on smooth surfaces. Rough or porous walls (brick, textured drywall) may only yield 250–300 sq ft per gallon.
Standard dimensions for subtracting:
- Standard door: ~20 sq ft (3 ft × 6.7 ft)
- Standard window: ~15 sq ft (3 ft × 5 ft)
Worked example: Accent wall is 14 ft wide × 9 ft tall = 126 sq ft. One window: 15 sq ft Paintable area = 126 − 15 = 111 sq ft Two coats needed (dark color over light): Total coverage needed = 111 × 2 = 222 sq ft Gallons needed = 222 / 350 = 0.63 gallons → buy 1 quart (covers ~87 sq ft) + 1 gallon, or 1 gallon is sufficient.
Practical tips:
- Always apply 2 coats when covering a drastically different color or using deep/saturated colors
- Primer coat is recommended if painting over a dark color or new drywall — add this to your coat count
- Buy 10–15% extra for touch-ups and second-coat variations
- 1 quart covers ~87 sq ft (good for small accent walls or touch-ups)
- Accent walls under 100 sq ft can often be done with a single quart, saving money