Paint Calculator

How much paint do you need for your room or wall? Find out in seconds — or check whether the paint you have is enough.

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Paint Needed
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2.5 L Cans
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5 L Cans
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10 L Cans
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Result
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Paint Required
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Formula

L = A × n ÷ c

L = paint in litres, A = area (m²), n = number of coats, c = coverage rate (m²/L)

How to use?

  1. 1
    Enter the wall areaType the total surface area to be painted in square metres (m²).
  2. 2
    Set coats and coverageChoose the number of coats (usually 2) and the paint's coverage rate from the label (typically 8–12 m²/L).
  3. 3
    Read the resultSee the exact litres needed and the minimum number of 2.5 L, 5 L and 10 L cans required.

FAQ

What coverage rate should I use?
Most interior emulsion paints cover 8–12 m² per litre per coat. Check the label on your paint tin for the manufacturer's figure.
How many coats do I need?
Two coats are standard for good coverage. Dark colours or bare walls may need three coats.
Does the calculator include doors and windows?
No. Subtract the area of doors and windows from your total wall area before entering the value.

How to Calculate Paint for a Room

Measure the width and height of each wall, multiply to get the area, then subtract openings. Multiply the paintable area by the number of coats and divide by the coverage rate on the tin to get the litres you need.

Why Use a Paint Calculator?

Buying too little paint means an unwanted trip to the shop mid-project. Buying too much wastes money. Our calculator tells you exactly how many litres — and how many cans — to buy.

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