In 1 square miles there are 27,878,400 square feet. Meanwhile in 1 square feet there are 3.58701e-8 square miles. Keep reading to learn more about each unit of measure and how they are calculated. Or just use the Square feet to Square miles calculator above to convert any number.
* Values rounded to 6 decimal places for readability
To convert square miles to square feet, use the fixed area conversion factor: 1 square mile = 27,878,400 square feet. This works because 1 mile = 5,280 feet, and area units must be squared.
Formula:
Example:
Tip: Write results as sq ft, square feet, or ft². These are all the same unit.
1 square mile equals 27,878,400 square feet.
That comes from 1 mile = 5,280 feet, then 5,280 × 5,280 = 27,878,400.
Use this formula:
square feet = square miles × 27,878,400
To go the other way:
square miles = square feet ÷ 27,878,400
Area uses squared units, so you square the distance conversion.
Since 1 mile is 5,280 feet, you calculate 5,280².
That equals 27,878,400 square feet in 1 square mile.
Multiply by 27,878,400:
2 × 27,878,400 = 55,756,800 square feet
Multiply the decimal value by 27,878,400.
Example: 0.5 square miles × 27,878,400 = 13,939,200 square feet.
Divide square feet by 27,878,400.
Example: 1,000,000 square feet ÷ 27,878,400 ≈ 0.03587 square miles.
It’s the same as any area measure.
1 square mile of land is 27,878,400 square feet, no matter the shape.
No. A square mile and a square foot are fixed units.
The conversion stays 1 sq mi = 27,878,400 sq ft everywhere.
Miles to feet converts length: 1 mile = 5,280 feet.
Square miles to square feet converts area, so you square the length change:
1 square mile = 5,280² = 27,878,400 square feet.
You still use the same conversion.
First, find the area in square miles, then multiply by 27,878,400.
If you only know the outline, you may need a survey or map-based area first.
You can, but the number gets large quickly.
For reference, 1 square mile = 640 acres and 1 acre = 43,560 square feet.
That also leads to 640 × 43,560 = 27,878,400 square feet.
The Calculate Box tool to convert square miles to square feet uses the open source script Convert.js to convert units of measurement. To use this tool, simply type a square miles value in the box and have it instantly converted to square feet.