Primer Calculator
Primer seals porous surfaces and evens absorption so the topcoat looks uniform. Enter the surface area, coats and your primer’s coverage to get the quantity to buy.
Primer Calculator
Paint & Wall
ft²
ft²/gal
gal
Primer needed
1.45gal
Containers to buy
2 × 1 gal
Coverage work
480 ft² × 1 coat(s)
Calculation breakdown
- 1Formula:
480 × 1 ÷ 330 = 1.45 gal
- Tinting primer toward the topcoat color can save a coat of expensive paint.
Primer = Surface area × Coats ÷ Coverage per unit. Cans = Primer ÷ Can size, rounded up.