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How much paint do you need?
Estimate wall and ceiling paint while accounting for doors, windows, coats, the coverage on your tin, and a sensible waste allowance.
m² per litre — check the paint tin
%
Estimated paint needed
Net wall area
Area across all coats
Allowance included
Coverage varies with paint, colour change, surface texture and application method. Treat this as a planning estimate and check the manufacturer's stated coverage.