Paint quantity
Paint quantity: use room length, room width, wall height. Review the formula, worked example and calculation steps.
Inputs
Use the units shown—
Enter your values and select Calculate.
Formula & explanation
Litres = [2(L+W)H−openings] × coats / coverage
Variables & units
- Room length
- m · minimum 0, maximum 1000000000000
- Room width
- m · minimum 0, maximum 1000000000000
- Wall height
- m · minimum 0, maximum 1000000000000
- Doors & windows area
- m² · minimum 0, maximum 1000000000000
- Coats
- Numeric value · minimum 1, maximum 20
- Coverage per coat
- m²/L · minimum 0.000001, maximum 1000000000000
Worked example
Use the example inputs to explore this model; the solution shows each supplied quantity.
Assumptions
Four rectangular walls; ceilings and product-specific application losses are excluded.
Formula version 1.0.0. JavaScript floating-point arithmetic applies. Results display up to 6 decimal places; stored values retain available precision. Use the units shown.
Practice with an example
Use the default input values to find the answer. The reset icon restores those values.
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