Tool
Paint Calculator
Enter your room dimensions to estimate paint quantity. Includes a 10% reserve for touch-ups and two-coat coverage.
Room dimensions
All measurements in meters
Estimate
Based on your room dimensions
- Wall area
- 48.6 m²
- Openings deducted
- 5.0 m²
- Paintable area (+10% reserve)
- 48.0 m²
You need approximately
9.6 L
≈ 4 × 2.5 L cans
About the paint calculator
How much paint do you need?
Buying too little paint delays your project; buying too much wastes money. This calculator estimates the exact amount based on your room size, subtracting doors and windows, and adding a standard 10% reserve.
Enter room length, width, and ceiling height in meters. Select the number of doors and windows — we deduct approximately 2 m² per door and 1.5 m² per window.
Frequently asked questions
- How is wall area calculated?
- Wall area = room perimeter × ceiling height, minus doors and windows.
- Why add 10% reserve?
- Extra paint covers cutting-in waste, touch-ups, and porous surfaces.