Bathroom paint by size (walls, two coats)
| Bathroom | Wall sq ft | Gallons | Buy this | Cost |
|---|---|---|---|---|
| Powder room (5 × 5) | 125 | 0.71 | 1 gallon | $45 |
| Small (5 × 8) | 173 | 0.99 | 1 gallon | $45 |
| Medium (8 × 8) | 221 | 1.26 | 1 gallon + 2 quarts | $85 |
| Large (8 × 10) | 253 | 1.45 | 1 gallon + 2 quarts | $85 |
Each assumes 8 ft walls, one door (20 sq ft) and one window (15 sq ft), 350 sq ft per gallon. Tile, a tub surround or a tall vanity mirror takes area off the paintable wall: measure them and subtract.
Bathroom paint tips
- Use a paint made for humid rooms and check its coverage on the label.
- Check for mildew and use a stain-blocking or mildew-resistant primer if needed.
- Small jobs often come out cheaper as a gallon than as several quarts at typical prices. The calculator checks.
Estimates only. Check your paint can’s label for coverage. Prices are typical 2026 US figures; use your store’s.