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measure once · buy with confidence
how much paint does your room need?
Enter the room or wall measurements for a quick estimate. We’ll show the paintable area, coats, volume and practical tin sizes. Every default is stated.
Planning estimate only. The current product label and surface conditions take priority.your project
measure the space
Only the dimensions are required. In feet, use decimals: 8.5 ft means 8 ft 6 in.
how this was worked out
see a hand-calculated paint example
one 10 ft × 8 ft wall
Assume no openings, two finish coats, smooth paint applied by roller, 400 sq ft of coverage per US gallon and a 10% planning allowance.
- Wall area: 10 × 8 = 80 sq ft.
- Two coats: 80 × 2 = 160 sq ft of coated area.
- Planning allowance: 160 × 1.10 = 176 sq ft.
- Volume: 176 ÷ 400 = 0.44 US gal.
- Rounded to the assumed container sizes, the buying list is 2 × 1 US qt tins (0.50 US gal total).
Assumption: the example uses label coverage exactly; a porous surface, sprayer or different product changes the answer.
Method reference · reviewed July 2026: Dulux coverage calculation guidance. The current product label still takes priority.