Exterior Paint Calculator

Enter your wall dimensions and window/door counts to estimate how many gallons of paint and primer you need, then compare costs across economy, standard, and premium grades.

Wall Perimeter (ft)

Wall Height (ft)

Number of Windows

Number of Doors

Number of Coats

Waste Factor (%)

Paint Pricing (edit to match local rates)

Economy ($/gal)

Standard ($/gal)

Premium ($/gal)

Primer ($/gal)

Paintable Area

1,278 sq ft

1,440 gross - 8 windows - 2 doors

Primer Needed

5 gal

$100.00

Cheapest Option

Economy

$325.00

Purchase Option	Quantity	Est. Cost
Economy (9 gal + 5 gal primer)Best value	14 gal total	$325.00
Standard (8 gal + 5 gal primer)	13 gal total	$420.00
Premium (7 gal + 5 gal primer)	12 gal total	$520.00

Cheapest option: Economy at $325.00 (incl. primer)Economy paint is the most affordable option. It works well for sheds, garages, and surfaces that will be repainted in 3-5 years. Expect to repaint sooner than with higher-grade paints.

This is a material estimate only. Actual coverage varies by surface texture, porosity, color change, and application method. Always check the manufacturer coverage specs on the paint can. Buy an extra gallon for touch-ups.