Measure surfaces and openings
Keep each rectangle visible so additions and subtractions can be checked.
A label-based paint estimate
See how your measurements become litres or gallons.
Add rectangular surfaces and openings, choose coats, then enter coverage stated for the exact paint. PaintCalc shows net area, coated area, required volume, and optional whole containers and cost. It never hides universal coverage, waste, porosity, texture, or application assumptions.
Free · No signup · No saved project · Runs in your browser
Three transparent steps
Measure, read the label, then review rounding
Enter stated coverage
Use m²/L or ft²/US gal from the exact product label; PaintCalc supplies no default.
Separate volume from packaging
Review required volume before optional rounding to the container size you enter.
Useful before buying paint
One formula with your own project data
- Keep several walls separate and subtract only openings you measured.
- Choose coat count and copy coverage from the exact paint label or datasheet.
- Enter verified container volume and optional price to expose package rounding and cost.
Bring the label
Build an estimate you can explain
Enter measurements, chosen coats, and the manufacturer’s stated coverage. PaintCalc keeps volume and packaging separate.