Instant calculator
Paint Calculator
Use the paint calculator to estimate coverage needs before you buy gallons for a room or project.
How to use
Quick steps
- Enter wall width, wall height, coats.
- Review the instant answer block and supporting calculations.
- Compare the result with related tools in the same category before making a decision.
Formula
How this calculator works
Paint needed = surface area x coats / coverage per gallon
Coverage varies by surface texture, primer use, and paint brand, so treat this as an estimate.
FAQ
Common questions
How does the paint calculator work?
It uses Paint needed = surface area x coats / coverage per gallon. Enter wall width, wall height, and coats to generate an instant estimate.
When should I use this paint calculator?
Estimate paint gallons needed from wall size and number of coats.
What should I keep in mind?
Coverage varies by surface texture, primer use, and paint brand, so treat this as an estimate.