Siding Square Footage Calculator
Enter your home dimensions and get an accurate material estimate including waste factor.
Free to use. No signup. No spam.
Wall Dimensions
How This Tool Works
Step 1
Enter your details
Step 2
We calculate based on real data
Step 3
Get your result and next step
Why This Matters
Knowing your square footage is the foundation of every siding estimate. If you do not know how much siding you need, you cannot compare quotes accurately. This calculator gives you a number that includes the standard waste factor so you are not caught short during installation or paying for material you do not need.
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Frequently Asked Questions
Measure the length and height of each wall. Multiply length times height to get the square footage of each wall, then add them together. Subtract window and door areas.
Most contractors add 10 to 15 percent for waste, cuts, and overlap. This calculator includes a 10 percent standard waste factor.
Yes. The calculator lets you enter the number and approximate size of windows and doors to subtract from your total.
One square equals 100 square feet. Divide your total square footage by 100 to get the number of squares needed.