Free tool
Paint calculator
Estimate gallons of paint and primer from area, coats, and coverage.
Surface
Paint needed
- Finish paint
- 9 gal
- Primer
- 5 gal
- Total
- 14 gal
Coverage varies by product and surface (350 SF/gal is typical). Estimate — verify before ordering.
Frequently asked
- How much paint do I need?
- Multiply the paintable area by the number of coats, then divide by the coverage rate (typically 350 SF per gallon) and round up.
- Should I include primer?
- Add one coat of primer for new drywall, patches, or color changes. This calculator adds primer gallons separately when enabled.
- What coverage rate should I use?
- 350 SF per gallon is typical for smooth interior walls; rough or porous surfaces cover less, so lower the rate.
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