Find the combined floor area of matching rectangular sections.
Square Footage Calculator
Form
Results
Area
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Table of Contents
1
What is Square Footage?
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How to Use This Calculator
- Enter or select Width, Length, Quantity.
- Check the unit beside each measurement. For a percentage or rate, use the scale and time period stated in the form.
- Choose Calculate, then compare the output with the formula and example below. If you change a value or option, calculate again to update the result.
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Formula Used
Total area = length × width × quantity
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Variables Explained
| Input | What it means |
|---|---|
| Width | The crosswise measurement, perpendicular to the length. |
| Length | The measured end-to-end distance of the section being calculated. |
| Quantity | Number of identical pieces, units or sections to include. |
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Worked Example
Four sections measuring 10 ft by 12 ft total 480 ft².
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Why Use This Calculator?
Use the result to put measurements on a common basis before comparing them or estimating quantities. The original measurement precision still limits the precision of the answer.
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Common Mistakes
- Measure each different room separately rather than using one rectangle for an irregular plan.
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Frequently Asked Questions
When should I round a measurement?
Carry the measured values and conversion factors through the calculation first. Round the final result to a precision justified by the original measurements.
Why can a supplier’s quantity differ?
Measurement conventions, nominal sizes, density assumptions and purchase rounding can change a practical quantity. Compare the units and assumptions before comparing the numbers.
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Sources & References
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