How much paint do I need?
Calculate how much paint you need for your walls, including deductions for windows and doors.
The amount of paint depends on the area, coverage and number of coats. Windows and doors can be deducted.
How the calculation works
- Enter the area in square metres.
- Subtract windows and doors if needed.
- Choose coverage and number of coats.
- Allow a small reserve for touch-ups.
The calculation is (area minus deductions) ÷ coverage × coats. Actual coverage depends on the surface and paint.
Calculator
A few details are enough to estimate the amount of paint you need.
Example: With 50 m², two coats and 12 m²/L coverage, you need approximately 8.33 litres of paint.
Pro tips
- For dark colors or large areas, plan for 2 coats – this doubles the amount needed.
- Keep some paint leftover for touch-ups and repairs.
Frequently Asked Questions
How much paint do I need per square meter?
Most wall paints cover 10-14 m² per liter per coat – lean toward the lower end for dark colors or highly absorbent surfaces.
Do I always need two coats?
Usually yes when switching to a significantly lighter or darker color; for a similar shade on a good surface, one coat is often enough.
How much extra paint should I buy?
Keeping a little paint in reserve for later touch-ups is a good idea – usually a 5-10% buffer on top of the calculated amount is enough.
Why does dark paint cover worse?
Dark and bold shades often need more pigment per area, which usually means an extra coat to look truly opaque.