Exterior House Paint Estimator
Free exterior house paint estimator — perimeter, wall height, siding type and doors/windows in one tool.
Runs entirely in your browser — room sizes and coverage figures never leave this pageTry: House perimeter=150, Wall height=10, Exterior doors=2, Windows=12, Coverage per gallon=300, Number of coats=2, Waste factor=15, Siding type=wood → 1500 sq ft, -222 sq ft, 1278 sq ft, Wood, 2, 9.8 gal, 10 gallons
How to use
Enter the house perimeter (add all outside wall lengths), wall height, and count exterior doors and windows. Rough siding like stucco or brick absorbs more paint — pick the right type for a realistic estimate.
FAQ
How is exterior coverage different?
Rough surfaces like stucco and brick absorb more paint, so coverage per gallon drops to 150-250 sq ft versus 300-400 on smooth siding.
Should exterior paint be different?
Yes — use exterior-grade paint with mildewcides and UV resistance. Interior paint will fail quickly outside.