What is the Paint Calculator?
The paint calculator is a free online tool that helps you work out paint quickly and accurately. It uses the standard formula Litres = area x coats / coverage and shows the result instantly as you type, along with a full breakdown so you can see exactly how the answer was reached.
How to use this calculator
- Enter wall length and height.
- Enter coats and paint coverage.
- See litres needed.
Formula used
Litres = area x coats / coverageExplanation of each input
- Wall length (m) โ the wall length used in the calculation.
- Wall height (m) โ the wall height used in the calculation.
- Number of coats โ the number of coats used in the calculation.
- Coverage per litre (m2/L) โ the coverage per litre used in the calculation.
Understanding your result
- Paintable area โ the calculated paintable area in m2.
- Paint required โ the calculated paint required in litres.
Step-by-step calculation
For the example values 10m x 3m, 2 coats:
- Apply the formula:
Litres = area x coats / coverage - Substitute the values: 30 x 2 / 10
- Result: 6 litres
Worked example
| Inputs | 10m x 3m, 2 coats |
|---|---|
| Working | 30 x 2 / 10 |
| Result | 6 litres |
Benefits and practical uses
This calculator saves you time and reduces errors when you need paint. It is useful for students, professionals and anyone who wants a fast, reliable answer without manual calculation. Results update instantly, work in your browser and can be copied or shared in one click.
Assumptions and limitations
- Even surface; stated coverage; no openings deducted.
Frequently asked questions
Should I subtract doors and windows?
For a quick estimate, no. For accuracy, subtract their area from the wall area.
Disclaimer: Results are provided for general information. Please verify important figures independently.