Measurement & Project Planning calculator
Square Footage Calculator
Convert an area from common metric or imperial units into square feet without confusing linear and squared conversion factors.
Convert an area from common metric or imperial units into square feet without confusing linear and squared conversion factors. For a reliable estimate, measure the real project rather than relying on nominal room or product sizes. The input most worth checking is the selected area units. Square-foot conversion uses the square of the length conversion. One square metre is about 10.7639 square feet, not 3.28084.
What you need to enter
The Square Footage Calculator uses the following project information to calculate the result.
- Value
- From unit
- To unit
Calculator result
Converted area
How the Square Footage Calculator works
To produce converted area, the Square Footage Calculator applies standard metric/imperial area conversion. The engine is configured for area converted to square feet, not as a generic text estimate. Check the selected area units, since an incorrect value there can materially change the result.
Square Footage Calculator worked example
Square Footage Calculator example: If the starting value is 20 m², converting to square feet gives about 215.28 ft². The square footage keeps the area conversion squared rather than applying a linear metre-to-foot factor. The worked figure becomes more useful when the selected area units is taken from the real product or site rather than a generic default.
Important calculation assumptions
For area converted to square feet, square-foot conversion uses the square of the length conversion. One square metre is about 10.7639 square feet, not 3.28084.
Frequently asked questions
How do I convert square metres to square feet accurately?
Multiply square metres by about 10.7639. Because this is an area conversion, do not use the linear metre-to-foot factor of 3.28084 by itself.
Can I use the Square Footage Calculator for several rooms?
Yes. Convert or calculate each room's area, then add the square-foot results. Keeping rooms separate first makes it easier to check measurements and exclude openings if needed.
How many decimal places should I keep in square feet?
Keep extra precision while combining areas, then round the final total to a level appropriate for the next calculation. Material orders usually need their own waste allowance afterwards.