Paint calculator
Paint, without the guesswork. Find the right amount of paint. Down to the last coat.
Your measurements
How this calculation works
A worked example
A 4 × 3 m room with 2.4 m walls has 33.6 m² of walls. Deduct 3 m² of openings: 30.6 m². Two coats at 10 m²/L need 6.12 L; with 10% allowance, 6.732 L. Buy three 2.5 L cans (7.5 L).
Before you buy
Add together the area of doors and windows that will not be painted. Ceiling inclusion adds length × width; it shares the same coats and coverage. Estimate separately if its finish differs. Coverage is per coat and depends on substrate and product. Primer is not included.
A few useful answers
Can I mix different can sizes?
This tool rounds up using one selected can size. Compare alternate sizes manually; the cheapest combination is not always the smallest volume.
Are my results saved?
Use Add to project to keep material estimates in your browser. You can copy results or print them at any time. No account or remote project storage is used.
Are the defaults product recommendations?
No. They are transparent example assumptions. Replace coverage, sizes, prices and allowances with your actual product details.