Square Footage Calculator
Use this square footage calculator entirely in your browser.
ResultArea: 120.00 square feet
Perimeter: 44.00 feet
Calculations happen locally in your browser.
How to use this calculator
- Enter the labelled values and review the live result.
- Review the live result and use Copy result when you need to share it.
How the calculation works
Rectangle area is length multiplied by width.
Formula
Rectangle area is length multiplied by width.
Step-by-step calculation
- Enter the labelled values and review the live result.
- Rectangle area is length multiplied by width.
- Check the displayed result, then copy it if needed.
Worked example
A 12 ft by 10 ft room covers 120 square feet.
Risk guidance
Frequently asked questions
Does this tool send my inputs anywhere?
No. The interactive calculation runs in your browser and this site does not submit tool inputs to a backend.
How should I use the result?
Check that the entered units and values match your situation, especially around dates, breaks, and rounding.
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