Siding Calculator

Estimate siding in squares for the walls and gable ends of a house.

ft²
%

Siding squares

14.9

  • Siding area (with waste)1,485 ft²
  • Net wall area1,350 ft²
  • Vinyl panel boxes (≈2 squares each)8

Estimates only. Round up when you order, and confirm structural details with your local building code.

How to use it

  1. Enter the house perimeter and wall height.
  2. Enter the gables.
  3. Subtract door and window area.

The formula

Area = perimeter × height + gables × ½ × width × height − openings

Squares = area × (1 + waste) ÷ 100

Worked example

House perimeter140 ft
Wall height9 ft
Gable ends2
Gable width30 ft
Gable height7 ft
Doors + windows area120 ft²
Waste10 %

Result

Siding squares14.9
Siding area (with waste)1,485 ft²
Net wall area1,350 ft²
Vinyl panel boxes (≈2 squares each)8

Tips before you order

  • Order trim, J-channel, corners and soffit separately.
  • Add 10–15% waste depending on the number of windows and corners.

Questions

How many squares of siding for a 2,000 sq ft house?

It depends on wall height and layout, not floor area — measure the walls. A simple two-story 2,000 ft² house often has 20–25 squares of wall.