How to Estimate Total Square Footage

You will need a tape measure and some simple calculations for total square footage.

For a rough estimate, you should be able to divide your siding into squares, rectangles and triangles

Squares and rectangles use the simple formula: square footage = height x length

Triangles use the formula: square footage = (height x length)/1.5

Remember to subtract the window areas

Triangles

square footage = HxL/1.5
The area of any triangular shape is the height times the length divided by 1.5