Roof Paint Calculator
Work out how much roof paint you need. Enter the roof area, the calculator returns the litres for two coats (allowing for waste) plus an indicative cost, for a roof restoration or repaint.
How we estimate this
Roof paint (membrane) typically covers about 3 to 4 square metres per litre over the two coats a roof restoration needs, so a 150m² roof uses roughly 40 to 50 litres. Profiled and porous roofs soak up more.
Pricing reviewed: November 2026.
Pricing reviewed November 2026. Indicative Australian costs, not a quote.
Understanding roof paints in Australia
Roof paint (membrane) typically covers about 3 to 4 square metres per litre over the two coats a roof restoration needs, so a 150m² roof uses roughly 40 to 50 litres. Profiled and porous roofs soak up more.
A proper roof restoration is more than paint, it usually includes cleaning, repairs, and a primer or sealer coat first, which are separate from the topcoat paint this calculates. Buy from one batch for a consistent colour.
Frequently asked questions
How much roof paint do I need?
About 3 to 4 square metres per litre over two coats, so a 150m² roof uses roughly 40 to 50 litres. Profiled and porous roofs use more. Enter your roof area for an estimate.
Do I need primer as well as roof paint?
Usually yes, a roof restoration includes cleaning and a primer or sealer coat before the membrane topcoats. Those are separate from the topcoat paint this calculator covers.
Are you a paint supplier / roof restorer?
Everyone on this page is working out what roof paint costs because they are ready to hire. Put your business right beneath the calculator, in your state, so you are who they find. From $50/mo.