What is the Paint Calculator?
Avoid buying too much or too little paint. Enter the room size, wall height, number of doors and windows and the number of coats, and the calculator estimates how many litres, gallons and 20-litre buckets you need, plus the cost.
Include the ceiling if you are painting it too. Adjust the coverage per litre to match the paint brand you are using.
How to use the Paint Calculator
- Enter room length, width and wall height.
- Add doors, windows, coats and coverage.
- Read the litres needed and estimated cost.
Painting tips
- New plaster usually needs a primer coat plus two finish coats.
- Dark to light colour changes may need an extra coat.
- Buy about 10% extra for touch-ups.
Frequently asked questions
How much area does one litre cover?
Typically 90–120 sq ft per coat for emulsion paint on smooth walls.
Why subtract doors and windows?
They are not painted with wall paint, so subtracting them gives a more accurate estimate.
Does it work in metres?
Enter sizes in feet; 1 metre ≈ 3.28 ft.
Is it free?
Yes.
This paint calculator is 100% free, needs no signup and works on phones, tablets and computers. Your data is processed in your browser and never uploaded.
Last updated: · By NodifyTech