m²
m²
m² per liter.
Output
Output will appear here
Click in the output to select all text
Paint Calculator
Related tools
Featured
Concrete Calculator
Calculate concrete volume and the cement, sand, and aggregate quantities needed from slab dimensions and a mix ratio.
Concrete calculatorCement calculator
Area Unit Converter
Convert between square meters, square feet, square yards, acres, hectares, and square miles.
Area converterSquare feet
Volume & Capacity Unit Converter
Convert between Liters, Milliliters, Gallons, Quarts, Pints, Cups, and Fluid Ounces.
Volume converterLiters
This Paint Calculator estimates how many liters of paint you'll need for a room or wall, based on the total wall area, the area taken up by doors and windows (which don't need paint), your paint's coverage rate per liter, and how many coats you're applying. Most paint cans list a coverage rate (e.g. "covers 10 m² per liter") — enter that figure along with your measurements and coat count to avoid buying too little or too much. It's useful for budgeting a painting project or making a single accurate trip to the store. Everything runs locally in your browser. Scroll down to enter your measurements.
Features
- Calculates paint needed from wall area, coverage rate, and coats
- Excludes door/window area from the paintable surface
- Supports any number of coats
- Instant recalculation as you adjust measurements
Why use this paint calculator?
- Avoids under- or over-buying paint
- No manual area/coverage math required
- Fully private — nothing uploaded
- Free with unlimited use
Frequently asked questions
Where do I find my paint's coverage rate?
It's printed on the paint can, usually as an area per liter or per gallon (e.g. "10 m² per liter" or "350 sq ft per gallon") — convert to your measurement units before entering it.
How many coats should I use?
Two coats is standard for most walls, especially when changing color significantly; a single coat may suffice for touch-ups or when painting a similar shade.
Should I subtract doors and windows?
Yes, subtracting their combined area gives a more accurate paint estimate since those surfaces aren't painted with wall paint — this calculator does that subtraction for you.
Does this account for primer?
No, this estimates topcoat paint only; if you're using a separate primer, calculate it separately using the primer's own coverage rate.
What if my walls have very different colors or textures?
Rougher or more porous surfaces typically need more paint than the can's stated coverage suggests — consider adding a buffer to the result for textured walls.