Convert Square Miles (mi²) to Square Feet (ft²) | mi² in ft²

You are: Home > Area > Square Miles to Square Feet

# Let's convert Square Miles (mi²) to Square Feet (ft²)

This quick and easy calculator will convert Square Miles (mi²) to Square Feet (ft²) and show formula, brief history on the units and quick maths for the conversion.

## Quick Reference for Converting Square Miles to Square Feet

Formula
ft² = mi² x 27878398.81
Quick Rough Maths
To get the Square Feet, multiply the number of Square Miles by 27.9 million
Square Miles (mi²) in 1 Square Foot
There are 0 Square Miles in 1 Square Foot
Square Feet (ft²) in 1 Square Mile
There are 27878398.81 Square Feet in 1 Square Mile

## Unit Information

Square Mile
/skwɛːˌmʌɪl/
Symbol: mi²
Unit System: Imperial

### What is the Square Mile?

The square mile is a unit of area and is an imperial unit with the symbol mi².

One square mile is equal in area to a square with edges one mile in length.

The Romans established the square mile; computed through a system of feet, paces and marches. The square mile's existence still remains in some places; for example "The Square Mile" is a term often used to describe the very centre of London in the UK (which just so happens to measure 1mi²).

Square Foot
/skwɛːˌfʊt/
Symbol: ft²
Unit System: Imperial

### What is the Square Foot?

The square foot is a unit of area and is an imperial unit with the symbol ft².

One square foot is equal in area to a square with edges one foot in length.

It is used a lot in expressing the internal size of a house, apartment, office or other properties so is a useful unit to understand.