How much exterior paint for a house?
Wall area ≈ 2 × wall height × (length + width) of the footprint. A 40×30 ft two-story home can need 15–25 gallons for two coats — depends on siding texture and color change.
Exterior Paint Calculator
Exterior latex covers less area than interior paint — default 250 sq ft per gallon on porous siding. Enter footprint dimensions and average wall height for total gallons.
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Project settings
Default 10% for touch-ups
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Related guides
Frequently asked questions
How many coats of exterior paint?
Most exterior repaints need two coats over primer or a significant color change. Maintenance coats over similar color may be one. Adjust coats in settings.
Does this include trim and soffits?
This focuses on main wall area. Add waste % or run separate calculations for trim — many DIYers buy trim paint by the quart.
Related calculators
Paint Calculator · https://paint-calculator.ca/exterior-paint-calculator/