How this calculation works
Estimate paint litres from wall area, openings, coverage, coats, and wastage. The result is calculated locally in your browser from the visible inputs, and the method below remains available for checking.
Worked example
90 m² net area, two coats and 10 m²/L coverage needs 18 litres before waste.
Assumptions and limits
- Inputs use the units shown beside each field.
- Intermediate values retain precision; displayed values are rounded for readability.
Questions people ask
How does the Paint Calculator work?
It applies this displayed method: Paint litres = net area × coats × (1 + waste) ÷ stated coverage. Values stay in your browser and are not submitted to a server.
What should I check before using the Paint result?
Inputs use the units shown beside each field. Intermediate values retain precision; displayed values are rounded for readability. Quantities are planning estimates. Site conditions, product sizes, workmanship and structural specifications require professional verification.
Does this Paint calculator save my information?
No. Calculation inputs are processed on this device. Sharing creates a URL only when you choose the share action.