Square Miles to Square Feet
Convert square miles (mi²) to square feet (ft²). Type in either box; the other updates as you go.
How to convert square miles to square feet
To convert square miles to square feet, multiply the number of square miles by 27,878,400.
Example
Convert 5 square miles to square feet:
Square Mile to square foot conversion chart
| Square Miles (mi²) | Square Feet (ft²) |
|---|---|
| 1 mi² | 27,878,400 ft² |
| 2 mi² | 55,756,800 ft² |
| 3 mi² | 83,635,200 ft² |
| 4 mi² | 111,513,600 ft² |
| 5 mi² | 139,392,000 ft² |
| 6 mi² | 167,270,400 ft² |
| 7 mi² | 195,148,800 ft² |
| 8 mi² | 223,027,200 ft² |
| 9 mi² | 250,905,600 ft² |
| 10 mi² | 278,784,000 ft² |
| 12 mi² | 334,540,800 ft² |
| 15 mi² | 418,176,000 ft² |
| 20 mi² | 557,568,000 ft² |
| 25 mi² | 696,960,000 ft² |
| 30 mi² | 836,352,000 ft² |
| 40 mi² | 1,115,136,000 ft² |
| 50 mi² | 1,393,920,000 ft² |
| 60 mi² | 1,672,704,000 ft² |
| 70 mi² | 1,951,488,000 ft² |
| 75 mi² | 2,090,880,000 ft² |
| 80 mi² | 2,230,272,000 ft² |
| 90 mi² | 2,509,056,000 ft² |
| 100 mi² | 2,787,840,000 ft² |
| 150 mi² | 4,181,760,000 ft² |
| 200 mi² | 5,575,680,000 ft² |
| 250 mi² | 6,969,600,000 ft² |
| 500 mi² | 13,939,200,000 ft² |
| 1,000 mi² | 27,878,400,000 ft² |
Going the other way? See the square feet to square miles chart.
About the units
Square Mile (mi²)
A square mile is 640 acres, about 2.59 square kilometers.
Square Foot (ft²)
A square foot is the area of a square one foot on each side, about 0.0929 square meters. US homes and offices are sized in square feet.
Frequently asked questions
How many square feet are in a square mile?
There are 27,878,400 square feet in a square mile.
How many square miles are in a square foot?
There are 3.587006428 × 10⁻⁸ square miles in a square foot.
How do you convert square miles to square feet?
To convert square miles to square feet, multiply the number of square miles by 27,878,400.
What is 5 square miles in square feet?
5 square miles equals 139,392,000 square feet.
Convert between square feet, square meters, acres, hectares and other units of area. Open the area converter to see a value in every unit at once.