How to Convert Feet to Miles (ft to mi)
Length conversions come up when reading overseas furniture specs, cycling the Round Island Route in kilometres while a foreign app shows miles, or checking marine distances in the Singapore Strait in nautical miles. This guide shows how to convert feet into miles by hand, with examples and a quick-reference table.
The conversion
To convert feet to miles, multiply the value by 0.0001893939. To go the other way, divide by the same number (or multiply by 5,280). Because the factor is tiny, scientific notation keeps the numbers manageable.
Miles = feet × 0.0001893939
Worked examples
- 3 ft = 0.000568 mi
- 12.5 ft = 0.002367 mi
- 75 ft = 0.014205 mi
Feet to Miles table
| Feet | Miles |
|---|---|
| 1 ft | 0.000189 mi |
| 2 ft | 0.000379 mi |
| 5 ft | 0.000947 mi |
| 10 ft | 0.001894 mi |
| 20 ft | 0.003788 mi |
| 25 ft | 0.004735 mi |
| 50 ft | 0.00947 mi |
| 100 ft | 0.018939 mi |
| 250 ft | 0.047348 mi |
| 500 ft | 0.094697 mi |
| 1,000 ft | 0.189394 mi |
Common questions
Is ft to mi exact?
The factors used here are the internationally defined values where they exist; results are rounded for display only.
How do I convert back?
Use the Miles to Feet converter.
Mistakes to avoid
Dropping the units
A bare number without a unit is easy to misread later. Always write the unit with the result.
Mixing similar-sounding units
US and imperial gallons, pints and tons are different sizes, and decimal kilobytes differ from binary kibibytes.
Rounding the factor too early
Using 3 instead of 3.28 for feet per metre introduces an error of almost 9% before you have started.
Background
Many conversion factors are exact by definition. The inch has been defined as exactly 2.54 centimetres since 1959, and the pound as exactly 0.45359237 kilograms, so conversions involving them can be as precise as you need.
Unit conversion is simply multiplication by a fixed ratio. The ratio between two units of the same quantity never changes, so once you know it you can convert any value in either direction.
Writing the units next to every number while you work is the simplest way to avoid mistakes. If the units do not cancel to leave the one you want, the calculation is set up wrongly.
For any value, use the Feet to Miles Converter or browse all length converters.
Run your own numbers: Feet to Miles Converter