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Calixo

Paint Calculator

Estimate how much paint you'll need for a wall, accounting for doors and windows.

Inputs

Saved Scenarios

— select 2+ to compare

Paint Needed

2.3 L

Paintable Area (m²)

11.4

Spark says

How it's calculated

Formula

Paint=(Length×Height)−Openings10×CoatsPaint = \dfrac{(Length \times Height) - Openings}{10} \times Coats
Openings
— Estimated area of doors (1.8 m² each) and windows (1.5 m² each)

What is the Paint Calculator?

This calculator estimates paint quantity from wall area, subtracting typical door and window sizes, using the common rule of thumb that 1 litre covers about 10 m² per coat.

How to use it

  1. 1 Enter the wall's length and height.
  2. 2 Enter the number of doors and windows.
  3. 3 Set how many coats you plan to apply.

Worked examples

6m × 2.7m wall, 1 door, 2 windows, 2 coats

About 2.4 litres of paint needed.

Try it

Limitations

  • •Actual coverage varies by paint brand, wall texture and application method — check your paint can's stated coverage for precise quantities.

Tips

  • 💡 Buying slightly more than calculated avoids a mismatched second trip for a different batch/tint.

Frequently asked questions

How much area does one litre of paint cover?

It varies by product, but 10 m² per litre per coat is a common estimate for interior wall paint on a primed surface.