Paint Calculator
Work out how much paint you need from wall area, coverage and number of coats. Free.
Typical emulsion 12–15 m²/l
Paint calculator
Use this paint calculator to see how much paint you need. Enter the total wall area to paint (in m² or sq ft), the coverage of your paint (m² per litre per coat), and the number of coats. The result includes about 10% extra for waste and touch-ups. Coverage varies by product and surface.
Frequently Asked Questions
How much paint do I need?
Enter the total wall area to paint (in m² or sq ft) and the coverage of your paint (m² per litre or sq ft per gallon). Add number of coats. The calculator shows how much paint you need.
What is typical paint coverage?
Emulsion typically covers about 12–15 m² per litre per coat. The calculator uses a default you can change. Coverage depends on surface and paint type.
Is the paint calculator free?
Yes. Free to use. Add 10% for waste and touch-ups.
How do I work out wall area for painting?
For each wall: height × width. Add all walls and subtract doors/windows if you prefer. Or use our square feet or area calculator for dimensions first.
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<p>Calculator: <a href="https://onlinecalculator.co.uk/specialised/paint-calculator" target="_blank">Paint Calculator</a> - OnlineCalculator.co.uk</p>APA Style Citation:
OnlineCalculator.co.uk. (2025). Paint Calculator. Retrieved from https://onlinecalculator.co.uk/specialised/paint-calculatorNote: This calculator is free to use and reference. No permission required for educational or commercial citation.