Room Paint Calculator

Calculate exactly how much paint you need to decorate your room. We automatically subtract standard sizes for doors and windows so you don't over-order.

Room Dimensions

A standard door removes approx 2m²
E.g. A standard single window (1.5m²). For wide double windows, count as 2.

Results

Paintable Wall Area: 0.00 m²
Total Volume Needed (2 coats): 0.0 Litres
Recommended Purchase: 0 x 2.5L Tins
Area excludes a generic generic generic 2m² per door and 1.5m² per window.
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Frequently Asked Questions

How many coats of paint should I apply to a wall?

For standard emulsion paint on previously painted walls, two coats are almost always required for a solid, even finish. Fresh plaster may need a mist coat followed by two full coats.

What is a mist coat?

A mist coat is a heavily watered-down layer of cheap emulsion paint applied to fresh, bare plaster. The plaster instantly sucks in the water, sealing the wall and allowing subsequent coats of expensive paint to adhere properly without peeling.

How do I calculate paint for the ceiling?

Simply measure the length and width of the floor, as the ceiling area will be exactly the same. Multiply the two numbers to get your square metre area, then input it into our calculator.

Do I need primer before painting?

If painting over bare wood, metal, stains, or dramatically changing the colour from dark to light, a primer or undercoat is essential for adhesion and coverage.