Paint Calculator
Litres of paint and can count for a wall area — by coats, coverage and wastage, minus doors and windows.
ft
ft
sq ft
Net paintable area = 400 − 40 = 360 sq ft.
Number of coats
Assumptions — edit to match your site
Coverage is per litre, per coat (emulsion ≈ 10 m²/L). Can size: 1 gallon ≈ 3.6 L; a drum is ~16 L.
m²/L/coat
= 107.6 sq ft/L
%
L
Paint needed7 litres
Cans2 × 3.6 L
How it's calculated
Net area = (40 × 10) − 40 = 360 sq ft
Litres = 360 × 2 coats ÷ 107.6 sq ft/L × 1.05 = 7 L
Cans = 7 ÷ 3.6 = 2
⚠️ Indicative estimate only — quantities and prices vary by site, materials and method. Always verify with your contractor or vendor before buying.
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