Home & Construction
Paint Calculator
Calculate how much paint you need for walls
Formulas and edge cases are reviewed against authoritative references before publication. For methodology, editorial standards, or corrections, use the links below.
Frequently asked questions
What does the Paint Calculator do?
It helps you calculate how much paint you need for walls. It supports both US and metric units.
What inputs do I need?
Enter Wall area, Coverage per gallon, and Coats.
Are decimals supported?
Yes, you can use decimal values where appropriate.
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About this tool
This Paint Calculator turns your inputs into practical results. Provide Coverage per gallon, Wall area, and Coats to calculate Paint needed.
Adjust values to compare scenarios and see how sensitive the result is. The calculation uses the numbers as entered, so double-check units and expect small differences from rounding in the displayed totals.