Siding Calculator: How Much Siding Does My House Need?
Estimate your home's wall area and how many squares of siding a project would take, including gables, windows and waste. One square covers 100 square feet of wall.
Siding Needed
0 squares
- Wall Area to Cover
- 0 sq ft
- Area With Waste
- 0 sq ft
Rough estimate only. Dormers, bump-outs, trim and roof pitch change the real number. No prices are shown; we measure on site and give a straight price range at a free estimate.
Get a Free EstimateHow the Calculator Works
It adds up the wall area from the outside measurements of your house, adds the triangle-shaped gable ends, takes out a share for windows and doors, then adds a waste allowance for the material you pick.
- Wall area = perimeter × wall height
- Each gable ≈ width × width ÷ 8 (a typical roof pitch)
- Openings are subtracted as a percentage of the wall
- Waste covers cuts, overlaps and trim pieces
Want to know what drives the price? Read siding replacement cost in Michigan or compare materials in vinyl vs. fiber cement vs. wood siding.
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Siding Services Behind the Numbers
Siding Replacement
New siding on the whole house in vinyl, fiber cement or wood, with the old siding taken off first.
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Vinyl Siding
Vinyl siding put on new, and vinyl repairs where we look for the closest color and profile to what's already on your house.
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Fiber Cement Siding
Fiber cement lap siding and panels, for when you'd like the look of painted wood on a siding that holds its shape.
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Wood and Cedar Siding
Cedar and other wood siding repaired board by board, or put on new, stained or painted to suit the house.
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