Formula
km to mi conversion formula
Use this relationship for a direct conversion:
Worked example
2 km = 1.2427423845 mi.
Metric factors and international inch, foot, yard, mile, and nautical mile definitions are exact.
Length conversion
1 kilometer (km) equals 0.621371192237 mile (mi). Enter any value below to convert from km to mi.
Enter a value and choose units. Results update instantly.
1 km = 0.6213711922 mi
| Unit | Value |
|---|---|
| Meter m | 1,000 |
| Kilometer km | 1 |
| Centimeter cm | 100,000 |
| Millimeter mm | 1,000,000 |
| Micrometer μm | 1,000,000,000 |
| Nanometer nm | 999,999,999,999.9998779297 |
| Inch in | 39,370.0787401575 |
| Foot ft | 3,280.8398950131 |
| Yard yd | 1,093.6132983377 |
| Mile mi | 0.6213711922 |
| Nautical mile nmi | 0.5399568035 |
| Light-year ly | 1.057000834e-13 |
Formula
Use this relationship for a direct conversion:
2 km = 1.2427423845 mi.
Metric factors and international inch, foot, yard, mile, and nautical mile definitions are exact.
Quick reference
| Kilometer (km) | Mile (mi) |
|---|---|
| 0.01 | 0.0062137119 |
| 0.1 | 0.0621371192 |
| 1 | 0.6213711922 |
| 2 | 1.2427423845 |
| 5 | 3.1068559612 |
| 10 | 6.2137119224 |
| 25 | 15.5342798059 |
| 50 | 31.0685596119 |
| 100 | 62.1371192237 |
| 1,000 | 621.3711922373 |
From unit
One thousand meters.
Symbol: km
To unit
Exactly 5,280 international feet.
Symbol: mi
Keep converting
Source
Definitions are checked against NIST SP 811: Guide for the Use of the SI. Calculations use full internal precision before display rounding.
View the complete length converterQuestions
Use the formula mi = km x 0.621371192237. 1 kilometer (km) equals 0.621371192237 mile (mi).
Both unit definitions use exact factors. Only the displayed decimal may be rounded.