Formula
mi to km conversion formula
Use this relationship for a direct conversion:
km = mi x 1.609344
Worked example
2 mi = 3.218688 km.
Metric factors and international inch, foot, yard, mile, and nautical mile definitions are exact.
Length conversion
Convert Mile to Kilometer
1 mile (mi) equals 1.609344 kilometer (km). Enter any value below to convert from mi to km.
Enter a value and choose units. Results update instantly.
1 mi = 1.609344 km
All Length units
From 1 mi| Unit | Value |
|---|---|
| Meter m | 1,609.344 |
| Kilometer km | 1.609344 |
| Centimeter cm | 160,934.4 |
| Millimeter mm | 1,609,344 |
| Micrometer μm | 1,609,344,000.0000002384 |
| Nanometer nm | 1.609344e12 |
| Inch in | 63,360 |
| Foot ft | 5,280 |
| Yard yd | 1,760 |
| Mile mi | 1 |
| Nautical mile nmi | 0.8689762419 |
| Light-year ly | 1.7010779502e-13 |
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Quick reference
Mile to Kilometer table
| Mile (mi) | Kilometer (km) |
|---|---|
| 0.01 | 0.01609344 |
| 0.1 | 0.1609344 |
| 1 | 1.609344 |
| 2 | 3.218688 |
| 5 | 8.04672 |
| 10 | 16.09344 |
| 25 | 40.2336 |
| 50 | 80.4672 |
| 100 | 160.9344 |
| 1,000 | 1,609.344 |
From unit
About the mile
Exactly 5,280 international feet.
Symbol: mi
To unit
About the kilometer
One thousand meters.
Symbol: km
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Source
Conversion standard
Definitions are checked against NIST SP 811: Guide for the Use of the SI. Calculations use full internal precision before display rounding.
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mi to km FAQ
How do you convert mile to kilometer?
Use the formula km = mi x 1.609344. 1 mile (mi) equals 1.609344 kilometer (km).
Is the mi to km conversion exact?
Both unit definitions use exact factors. Only the displayed decimal may be rounded.