Estimate paint required for any room. Calculates liters needed by area and coats. Simple DIY paint calculator.
PAINT CALCULATOR – COVERAGE & LITERS/GALLONS ESTIMATOR (m², ft²)
Use this free paint calculator to estimate how much paint you need for walls, rooms, and home DIY projects. Enter wall dimensions, doors, windows, and number of coats to get instant coverage and total liters/gallons required.
Paint Coverage Calculator
Results will appear here once you enter your dimensions.
Related Calculators
Standard Paint Coverage
Most wall paint covers approximately:
10–12 m² per liter per coat
This varies by:
- surface texture
- paint brand and finish
- roller or spray method
Example
Room: 4m × 3m, with 2.5m wall height
Wall surface: 4×2.5 × 2 (long walls) + 3×2.5 × 2 (short walls)
= 20 + 15
= 35 m² approx.
If you apply 2 coats:
35 m² × 2 = 70 m² total coverage needed
At ~10 m² per liter:
70 ÷ 10 = 7 liters of paint
When to Add Extra
- Rough or textured walls require more paint
- Very dark-to-light color changes need a primer or 3rd coat
- Bathrooms and high-humidity zones benefit from mold-resistant finish
FAQs
How many coats should I use?
Most interior walls need 2 coats for proper finish.
Can I include ceilings?
Yes, once live you can input ceiling area separately.
What about primer?
Primer is recommended if painting new drywall or switching from dark to light color.
Does paint brand matter?
Higher-quality brands provide better coverage per liter, reducing total paint needed.