Paint Coverage Calculator — Litres Needed | How to use and interpret results
Estimate paint volume from area, coat count and the product's coverage per litre. Compare litres, US gallons and an optional ten-percent allowance in one result.
- Runs in your browser
- Nothing is uploaded
- No signup; device limits apply
Numbers stay on your device. Nothing is sent to a server.
How to use this tool
Enter area in m², number of coats and coverage in m²/L from the label. Check whether openings are already deducted and whether coverage describes a single coat.
Results and examples
20 m² with two coats at 10 m²/L needs 4 L, or 4.4 L with the displayed 10% allowance. Round separately to the actual can sizes sold.
Worked example
20 m² with two coats at 10 m²/L needs 4 L, or 4.4 L with the displayed 10% allowance. Round separately to the actual can sizes sold.
Limitations
- Surface absorption and the underlying colour can change real consumption.
- Door/window deductions and retail package counts are not calculated.
Fields
| Field | Guidance and constraints |
|---|---|
| Area (m²) | Accepted range: 0.1–1000000 · Input step: 0.1 |
| Number of coats | Accepted range: 1–6 · Input step: 1 |
| Coverage on the tin (m² per litre) | Accepted range: 1–30 · Input step: 0.1 |
Data handling
Processing stays in the current browser tab; the site does not upload tool input for the calculation itself.
Sources
Frequently asked questions
How much paint covers 20 m² twice?
20 m² with two coats at 10 m²/L needs 4 L, or 4.4 L with the displayed 10% allowance. Round separately to the actual can sizes sold.
Is the displayed volume an exact purchase quantity?
Surface absorption and the underlying colour can change real consumption. Door/window deductions and retail package counts are not calculated.
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