How much stain for a house exterior?
Wall area ≈ 2 × wall height × (length + width) of the building footprint. Divide by coverage on your stain can — often 150–250 sq ft/gallon on porous wood.
Exterior House Stain Calculator
Enter your home footprint (length × width) and average wall height. We calculate exterior wall area the same way pros estimate siding stain.
Rooms
ft
in
ft
in
ft
in
Project settings
Enter building footprint (length × width) and wall height. Default coverage is 200 sq ft/gallon for siding.
Default 10% for touch-ups
$
Frequently asked questions
Is house stain coverage different from paint?
Yes. Stain soaks into wood and typically covers less area than paint. Use the sq ft/gallon printed on your stain label for accuracy.
What about trim and soffits?
This calculator focuses on main wall area. Add extra stain for trim, soffits, and gables — the 10% waste allowance helps cover some of that.
Paint Calculator · https://paint-calculator.ca