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Siding Calculator

Result
—squares
◆ LIVE 3D PREVIEW
Sq Feet
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Est. Cost
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CalcBuild › Siding Calculator

How to Calculate Siding

Use this free siding calculator to get instant, accurate results for your construction project. Simply enter your measurements above and the calculator will automatically compute the result using industry-standard formulas.

Pro Tip: Always add 10-15% extra material to account for waste, cuts, and job-site conditions. This is standard practice recommended by experienced contractors.

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💡 Pro Tips — Siding

❓ Frequently Asked Questions

+How much siding do I need?
Calculate wall area minus windows and doors. Add 10% for waste. Siding is sold in "squares" (100 sq ft).
+What siding lasts longest?
Fiber cement (Hardie): 30-50 years. Vinyl: 20-40 years. Wood: 15-30 years with maintenance. Brick: 100+ years.
+Should I remove old siding?
Not required for vinyl over wood. But inspect for rot and moisture issues first. Two layers of rigid siding must be removed.
+What is the cheapest siding?
Vinyl at $3-5/sq ft installed. Fiber cement is $5-8/sq ft. Wood is $6-10/sq ft. Stone veneer is $12-20/sq ft.
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