Siding Calculator App

Estimate siding area after subtracting doors and windows, then add a waste allowance and convert the result to siding squares.

Calculate your estimate

Your result updates automatically when all required fields are complete.

0 sq ft

Siding required

Your estimate will appear here when the required fields are complete.

How to use the Siding Calculator App

Measure exterior walls

Measure exterior walls

Add the square footage of all wall surfaces that will receive siding.

Subtract openings and add waste

Subtract openings and add waste

Enter combined door and window area plus an allowance for cuts and damage.

Review square footage and squares

Review square footage and squares

Use the result to compare siding package coverage and plan an order.

Benefits of using the Siding Calculator App

Exclude doors and windows

Remove major openings from the gross wall area for a more useful material estimate.

Exclude doors and windows

Plan for cuts and waste

Include extra siding for trimming, pattern matching, and damaged pieces.

Plan for cuts and waste

Convert area into siding squares

See square feet and squares, where one siding square covers 100 square feet.

Convert area into siding squares

Turn your calculator into an app

Build a custom calculation, quote, or field-service app with Jotform Apps. Add forms, collect information, and share your app without coding.

Explore more calculator apps

Estimate costs, materials, time, and measurements with free calculators. Need one for your business? Build your own with Jotform Apps.

Frequently Asked Questions

  • What is a siding square?

    A siding square is the amount of material needed to cover 100 square feet of wall area.

  • How do I measure wall area?

  • Should I subtract windows and doors?

  • How much waste should I include?

  • Does the result include trim and accessories?

  • Is the Siding Calculator App free to use?

  • Can I use this calculator on a phone?

  • Can I build my own calculator app with Jotform?