🎨 Paint Coverage Calculator

Calculate litres needed for walls and ceiling. Accounts for doors, windows, coats, and paint quality. Recommends tin sizes to buy.

Room length (m)

Room width (m)

Wall height (m)

Number of coats

Paint type

Doors (each ≈ 2 m²)

Windows (each ≈ 1.5 m²)

Include ceiling (adds length × width)

Cost estimate (optional)

Paint price per litre

How to calculate paint quantities

Paint is sold by coverage — how many square metres one litre will cover per coat. Premium paints generally have better opacity, requiring fewer coats when changing colour.

Tips for buying paint

Buy a little extra — leftover paint is essential for future touch-ups and is better than running short mid-wall.
Tin sizes in Australia: Paint is commonly sold in 1 L, 2 L, 4 L, and 10 L tins. Larger tins are cheaper per litre.
Feature walls often need 3 coats when switching from light to dark.
New surfaces (bare plaster, gyprock) need a sealer coat before the top coats — budget for an extra coat on new builds.

🎨 Fun fact: Australians spend approximately $1.4 billion on paint each year. Dulux has been in Australia since 1918 and remains the market leader.