Formula
ft² to mi² conversion formula
Use this relationship for a direct conversion:
mi² = ft² x 0.00000003587
Worked example
2 ft² = 0.0000000717 mi².
Values derived from exact metric and international length definitions.
Area conversion
Convert Square foot to Square mile
1 square foot (ft²) equals 0.00000003587 square mile (mi²). Enter any value below to convert from ft² to mi².
Enter a value and choose units. Results update instantly.
1 ft² = 0.0000000359 mi²
All Area units
From 1 ft²| Unit | Value |
|---|---|
| Square meter m² | 0.09290304 |
| Square kilometer km² | 0.0000000929 |
| Square centimeter cm² | 929.0304 |
| Square millimeter mm² | 92,903.04 |
| Square inch in² | 144 |
| Square foot ft² | 1 |
| Square yard yd² | 0.1111111111 |
| Square mile mi² | 0.0000000359 |
| Acre ac | 0.0000229568 |
| Hectare ha | 0.0000092903 |
Recent conversions
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Quick reference
Square foot to Square mile table
| Square foot (ft²) | Square mile (mi²) |
|---|---|
| 0.01 | 0.0000000004 |
| 0.1 | 0.0000000036 |
| 1 | 0.0000000359 |
| 2 | 0.0000000717 |
| 5 | 0.0000001794 |
| 10 | 0.0000003587 |
| 25 | 0.0000008968 |
| 50 | 0.0000017935 |
| 100 | 0.000003587 |
| 1,000 | 0.0000358701 |
From unit
About the square foot
The area of a square one foot on each side.
Symbol: ft²
To unit
About the square mile
The area of a square one mile on each side.
Symbol: mi²
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Related conversions
Source
Conversion standard
Definitions are checked against NIST SP 811: Area units. Calculations use full internal precision before display rounding.
View the complete area converterQuestions
ft² to mi² FAQ
How do you convert square foot to square mile?
Use the formula mi² = ft² x 0.00000003587. 1 square foot (ft²) equals 0.00000003587 square mile (mi²).
Is the ft² to mi² conversion exact?
Both unit definitions use exact factors. Only the displayed decimal may be rounded.