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Paint Calculator
Enter wall size and coats — watch paint fill and get liter and can estimates.
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Planning workflow
Typical sequence for your project
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Paint planning
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Enter wall size and coats — watch paint fill and get liter and can estimates.
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Typical sequence for your project
Paint planning
Your current step
Practical notes to help you use this tool confidently — scan the sections below or explore related calculators.
Estimate paint volume in liters and approximate can count for a rectangular wall, based on area, number of coats, and coverage per liter.
The fill preview shows cumulative coats building up — helping you visualize coverage rather than only reading a number.
Wall area (length × height) is multiplied by the number of coats, then divided by the coverage rate (m² per liter from your paint label).
Can count assumes a standard can size used in the calculation module — check your product label for exact volume.
Using brochure coverage on a rough surface — porous or textured walls need more paint.
Forgetting primer — primed vs unprimed surfaces change consumption significantly.
Ignoring deductions — subtract doors and windows for interior rooms.
A 4 m × 2.5 m bedroom with two coats at 10 m²/L is a common interior scenario — often 2–4 liters depending on surface.
Exterior walls with lower coverage (8 m²/L) and larger areas increase totals quickly — plan for two full coats.
Buy all paint for one room from the same batch to avoid color variation.
Keep 10% reserve for touch-ups — especially for accent walls and exteriors.
Related tools: Concrete · Brick Wall · Planning guides · About
Quick answers for common planning questions.
Divide wall area by the coverage printed on the can (m² per liter), then multiply by the number of coats. This calculator does that automatically.