Convert square feet to square miles
Select how many decimal places the result will be rounded to:
How to convert square feet to square miles
To convert square feet to square miles, divide a square feet value by 27878400.
Formula mi² = ft² ÷ 27878400
Example: Convert 100000 square feet to square miles Calculations: 100000 ft² ÷ 27878400 ≈ 0.00359 mi²
Square foot (ft²)
The square foot is an imperial and US customary systems unit of area, defined as the area of a square with sides of 1 foot. It is approximately equal to 0.0929 square meters.
Square mile (mi²)
The square mile is an imperial and US customary systems unit of area, defined as the area of a square with sides of 1 mile. It is approximately equal to 2.59 square kilometers.
Browse related converters
Square feet to Square kilometers Square feet to Square meters Square feet to Square yards Square feet to Square inches Square feet to Hectares Square feet to Acres