How it works
Liters = area × coats ÷ coverage × (1 + waste/100)
Input definitions
- Paintable wall area (m²)
- Enter the value in the labeled unit.
- Coverage (m²/liter/coat)
- Enter the value in the labeled unit.
- Coats
- Enter the value in the labeled unit.
- Waste (%)
- Enter the value in the labeled unit.
A worked example
- Paintable wall area (m²)
- 40
- Coverage (m²/liter/coat)
- 10
- Coats
- 2
- Waste (%)
- 10
8.8
Assumptions & limits
Estimate only. Subtract openings yourself and use the manufacturer’s coverage for your surface.
Sources & review
Maintained by AnsRio. Methods and examples use automated checks; this does not imply independent professional certification.
Method updated 2026-10-17. Content checked against the stated method and examples. Our verification approach.
Common questions
Should I order exactly the quantity shown?
Treat the result as a planning estimate. Check measurements, units, pack sizes, waste, openings and local requirements; the stated formula does not replace a project-specific design.
How does the Paint quantity tool work?
Liters = area × coats ÷ coverage × (1 + waste/100).
What are the assumptions and limits of Paint quantity?
Estimate only. Subtract openings yourself and use the manufacturer’s coverage for your surface.