Paint Calculator
How much paint you need — by room size, coats, and coverage.
Paint needed (2 coats)
6.04 L
- Wall area (net)
- 30.20 m²
- Total painted area
- 60.40 m²
- Round up to buy
- 7 L
Coverage estimate: ~10 m² per liter (or ~350 ft² per US gallon). Porous walls and dark-to-light repaints use more. Buy ~10% extra for touch-ups.
About this calc
Figure out how much paint to buy based on wall area, coats, and door/window deductions. Works in metric or imperial.
FAQ
- How much area does 1 liter of paint cover?
- Roughly 10 m² per coat on smooth, primed drywall. Textured or porous walls may need 7-8 m²/L. Premium paints often claim more but perform similar in practice.
- Do I need 1 or 2 coats?
- Almost always 2. A single coat on colored or porous walls looks patchy. Skip the second only when repainting the same light color on well-primed walls.
- Should I prime first?
- Yes when changing from dark to light, covering stains, or painting new drywall. A single coat of primer is cheaper than 3 coats of finish paint.