How do you convert square foot to mi2?

Enter the square foot value in the input field above and the calculator instantly shows the result in mi2. The step-by-step formula and a worked example are displayed below the converter.

What is the formula to convert square foot to mi2?

The exact conversion formula for square foot to mi2 is shown in the 'How to Convert' section on this page, along with a reference table of common values.

Can I convert mi2 back to square foot?

Yes. Click the swap button (⇄) between the two fields to reverse the direction. You can then enter a mi2 value and get the equivalent in square foot.

Area Converter

Square Foot to Square Mile Conversion

Please provide values below to convert square foot [ft²] to square mile [mi²], or vice-versa.

Square Foot (ft²)

ft²

Square Mile (mi²)

mi²

Result

How to Convert Square Foot to Square Mile

Formula

What is a Square Foot?

A square foot is an imperial/US customary unit of area equal to a square with sides of one foot (12 inches). It is widely used in real estate and construction.

What is a Square Mile?

A square mile equals approximately 2.59 km², used in the US and UK.