What is a square of vinyl siding?
A square of vinyl siding is equal to 100 square feet. 10 foot by 10 foot = 100 square feet (10′ x 10′ = 100 sq ft). There are also other ways to look at 1 Sq of Vinyl Siding. For example: 2′ x 50′ = 100 sq ft, 4′ x 25′ = 100 sq ft, and so on.
You can use this calculator to calculate the number of vinyl siding squares your project will need. A “square” of siding is unit of measure called Area. The equation that is used in this calculator is Area = Length x Width ÷ 100 (A=lw/100)
Since house siding is often measured in feet and inches (example: 10 feet and 6 inches) this calculator allows you to enter feet and inches, feet only, inches only or any combination of the two.
How many boxes of siding will I need?
Answer : That depends. Check with the vinyl siding manufacturer to see how many squares are in one box.
Detailed answer : Vinyl siding typically comes in 2 square boxes so if your calculation above is 58 squares of siding you would need 29 boxes of vinyl siding. However if you’re calculating for vinyl shake siding which is often 1/2 or 1/3 of a square per box your calculations will be different.
What about calculating for waste?
Yes calculating for waste is a VERY IMPORTANT thing. Some contractors calculate up to 30% on top of the raw exterior square footage (just the parts that will get vinyl siding) but it really depends on the project. Back in our contracting days we used to get our waste down between 5~10% (max) but we had to be very consious of reusing our cut-offs and plan the order of the walls we would do (plan our cuts). Most skilled vinyl siding installers will probably need to calculate around 15~20% on most projects. Your results may vary. There honestly is A LOT of skill that goes into bidding and installing vinyl siding. Take your time, proper planning in the begining will save you a lot of potential headaches in the long run.