Estimate paint needed for walls based on room dimensions and coats.
Estimate paint needed for walls based on room dimensions and coats.
Enter values above and click Calculate — results will appear here with the formula explained.
Paint estimation chains four assumptions: perimeter times height gives gross wall area; standard doors and windows subtract fixed allowances; coats multiply demand; and the tin's stated coverage converts area into liters. Each link carries slop, hence the built-in 10% buffer.
Coverage ratings assume smooth primed surfaces. Fresh drywall, textured plaster and dramatic color changes can consume 30–50% beyond the label figure — dark-over-light transitions especially reward tinted primer before counting finish coats.
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Paint Calculator: Estimate paint needed for walls based on room dimensions and coats. Formula: walls = 2×(L+W)×H − openings. Example: A 5×4 m room, 2.
Paint estimation chains four assumptions: perimeter times height gives gross wall area; standard doors and windows subtract fixed allowances; coats multiply demand; and the tin's stated coverage converts area into liters. Each link carries slop, hence the built-in 10% buffer.
Coverage ratings assume smooth primed surfaces. Fresh drywall, textured plaster and dramatic color changes can consume 30–50% beyond the label figure — dark-over-light transitions especially reward tinted primer before counting finish coats.
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A 5×4 m room, 2.5 m ceilings: 45 m² gross, minus one door and two windows ≈ 41.7 m². Two coats at 10 m²/L needs 9.2 L — grab three 4-L tins.
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