Exterior Paint Quantity Calculator
Exterior coverage typically 250-300 ft²/gal — rougher surfaces, porous siding.
Result
Paint needed
12.55 gallons
13 gallons rounded up.
- Area1500 ft²
- Coats2
- Coverage275 ft²/gal
- Gallons12.55
- Round up13
Step-by-step
- Gallons = 1500 × 2 / 275 × 1.15 = 12.55.
How to use this calculator
- Estimate house exterior surface (perimeter × height + gables).
- Enter coats and coverage.
- Buy rounded-up gallons.
About this calculator
Exterior paint coverage is lower than interior because siding is rougher and absorbs more. Use 250-300 ft²/gal for typical wood siding; lower for masonry. Higher waste factor (15%) reflects the larger surface and outdoor working conditions.
Frequently asked
Perimeter × wall height + gable triangles. A 2,000 ft² house typically has 1,500-2,500 ft² of paintable exterior.
Related calculators
Interior Paint Quantity Calculator
Gallons needed = wall area × coats / coverage (350 ft²/gal default).
Wall Area for Paint Calculator
Perimeter × ceiling height − doors and windows = paintable area.
Roofing Square Count Calculator
1 roofing square = 100 ft². Bundles = squares × 3 (for 3-tab) or × 4 (architectural).
Shingle Bundle Count Calculator
Bundles = roof area / coverage per bundle (33⅓ ft² for 3-tab).
Fence Material Calculator
Posts, panels, and rails for a wood/vinyl/chain-link fence.
Deck Material Calculator
Decking boards, joists, posts, and fasteners for a residential deck.