FREE ONLINE CALCULATOR

Siding Calculator

Estimate siding square footage and 100-square-foot siding squares after openings and waste.

✓ Instant results ✓ Editable inputs ✓ Formula explained

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CONSTRUCTION · TOOLS

MEASURE Enter project dimensions

ESTIMATE Calculate material volume

PLAN Check practical assumptions

CALCULATION TOOL

Siding Calculator

Change any value and calculate again.

Uses the values you enter. No account required.

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ABOUT THIS TOOL

When to use a siding calculator

Estimate siding square footage and 100-square-foot siding squares after openings and waste.

All assumptions are visible and adjustable. Check rates and underlying data against original sources before making a decision.

HOW IT WORKS

The calculation

Net siding area = max(wall area − openings, 0) × (1 + waste%); siding squares = net square feet ÷ 100.

Read the full guide →

ASSUMPTIONS

Know the limitations

Trim, starter strips, overlaps, different panel exposure and local installation requirements are excluded.

Results are estimates derived from your inputs.