Paint Calculator
Estimate how many liters of paint you need for a wall, accounting for coats and openings.
Estimates only — not professional financial, medical, legal or engineering advice. Read full disclaimer.
Calculating...
Result
Fill in the form and click Calculate to see your result here.
How it's calculated
Paintable area = Wall Area − Door/Window Area. Paint required (liters) = (Paintable Area × Number of Coats) ÷ Coverage per Liter.
Example
Example: Paint Calculator
Inputs
- Wall Area: 100
- Door Window Area: 0
- Coverage Per Liter: 10
- Number Of Coats: 2
- Price Per Liter: 0
Outputs
- Paint Required: 20
- Paintable Area: 100
- Estimated Cost: 0
This example uses typical sample values. Adjust the inputs above to see how the results change for your own numbers.
About this calculator
The Paint Calculator estimates the liters of paint required to cover a wall area, after deducting doors and windows, based on the paint's coverage rate and the number of coats you plan to apply. It also estimates total cost if you provide a price per liter.
Frequently Asked Questions
Enter the number of coats into the calculator and it will multiply the paintable area accordingly - two coats roughly doubles the paint quantity needed for one coat.
Most paints cover 8-12 m² per liter, depending on the surface and paint type. Check your paint tin's label for the manufacturer's exact coverage rate.
Yes, subtracting door and window area gives a more accurate paint estimate. Enter the total area of openings and the calculator will deduct it automatically.