Vinyl Siding Calculator
Squares of vinyl siding for a house.
Enter your values
ⓘ Live results
Results
- Siding squares
- 27
- Net wall area
- 2410 sq ft
- Starter strip
- 160 ft
- J-channel (around openings, est.)
- 147 ft
Quick answer
Siding is sold in squares of 100 sq ft; net wall area is divided by 100 and rounded up with waste.
squares = ceil(net area x (1+waste%) / 100)
How to use the Vinyl Siding Calculator
- 1Measure the house perimeter and average wall height.
- 2Subtract door and window areas to get net wall area.
- 3Add 10% waste and round up to whole squares (100 sq ft each).
Worked example
Using the values the calculator loads with:
Inputs
- Perimeter160 ft
- Average wall height16 ft
- Doors/windows area150 sq ft
- Waste allowance10 %
Results
- Siding squares27
- Net wall area2410 sq ft
- Starter strip160 ft
- J-channel (around openings, est.)147 ft
Frequently asked questions
What is a siding 'square'?
A unit of 100 sq ft, standard in the siding trade for pricing and ordering.
Do I need housewrap first?
Yes, a weather-resistive barrier under vinyl siding is standard practice and often code-required.
About this calculator
- Built and reviewed by James Whitfield · How we build and test calculators
- Report an error
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.