Vinyl Siding Calculator
Find how many squares of vinyl siding a wall needs, with starter strip, corner posts and nails.
Change the values and press Calculate to work out your own figures.
Enter the wall's size, the openings and the corners.
Show the working
- squares = (wall + gable − openings) ÷ 100
How to use it
Enter the wall's size, the openings and the corners.
Lengths can be decimals, fractions or tape entries such as 12' 6 1/2" (in feet or inches). Prices are optional.
Key facts
squares = (wall area − openings) ÷ 100; nails ≈ 2/3 lb a square
Trim
J-channel goes around every window and door and under soffits; undersill trim under windows and at the top of walls.
Questions
How many squares of vinyl for a 40 × 10 ft wall?
4 squares before waste.
Formulas
squares = (wall area − openings) ÷ 100; nails ≈ 2/3 lb a square
Sources
Limitations
- Material densities are typical values (the midpoint of the commonly published range); real loads vary with moisture, grading and compaction, so check with your supplier or type in their density.
- Tank results are the geometric volume; real tanks have wall thickness and fittings.