PRACTICAL TOOLS · MATERIAL ESTIMATES
Paint Calculator
Estimate paint litres from the surface area, openings, coats and product coverage.
Use coverage from the paint manufacturer for your surface. Primer is separate. Rough or porous surfaces may need more paint.
How the calculation works
Paint litres = (surface area − unpainted area) × coats ÷ coverage, then add extra paint.
Before you order
Measure your project, use consistent units and replace example assumptions with your own product or project specifications. These tools estimate quantities; they do not specify structural design or guarantee purchase quantities.