How Much Paint Do I Need?
To calculate how much paint you need, you'll want to know the size of the walls you're painting, the number of coats, and the type of paint coverage (in m² per litre). On average, one litre of paint covers between 10–13 square metres per coat. Use the tool below to get a quick, accurate estimate.
🎨 Try the Calculator
Use our free tool below to estimate exactly how much paint your room needs based on its size, number of coats, and paint type:
Formula to Estimate Paint Needed
For a basic estimation, use this simple formula:
(Wall Area - Windows & Doors) × Number of Coats ÷ Paint Coverage
Tips for Accuracy
- Always allow 10% extra for touch-ups and absorption.
- Use higher coverage values for premium or vinyl-based paints.
- Use a roller for more consistent application.
Next: Check out our Paint Coverage Guide for detailed paint types and coverage rates.
