Features
- Answer updates as you type.
- Clear breakdown you can copy.
- Works on phone and desktop.
Free and private
The calculation runs in your browser. Nothing you type is sent or stored, and there is no limit.
Questions
How much does a litre cover?
About 10 m² per coat (a gallon about 400 ft²).
Is it free?
Yes - free and unlimited, with no sign-up and no watermark.