Kilometer/Hour to Mile/Hour Conversion
1 Kilometer/Hour (km/h) equals 0.6213711922 Mile/Hour (mph).
1 Kilometer/Hour = 0.6213711922 Mile/Hour
How to convert Kilometer/Hour to Mile/Hour
Multiply the value in Kilometer/Hour by 0.6213711922 to get Mile/Hour. To convert back from Mile/Hour to Kilometer/Hour, divide by 0.6213711922 — or multiply by 1.609344.
mph = km/h × 0.6213711922
Example: 25 km/h × 0.6213711922 = 15.53427981 mph.
Watch out: Mach number depends on air temperature. This converter uses 343 m/s, the speed of sound in dry air at about 20 °C; at cruising altitude the real figure is lower.
Kilometer/Hour to Mile/Hour conversion table
| Kilometer/Hour (km/h) | Mile/Hour (mph) |
|---|---|
| 1 | 0.6213711922 |
| 2 | 1.242742384 |
| 3 | 1.864113577 |
| 4 | 2.485484769 |
| 5 | 3.106855961 |
| 10 | 6.213711922 |
| 15 | 9.320567884 |
| 20 | 12.42742384 |
| 25 | 15.53427981 |
| 50 | 31.06855961 |
| 75 | 46.60283942 |
| 100 | 62.13711922 |
| 250 | 155.3427981 |
| 500 | 310.6855961 |
| 1,000 | 621.3711922 |
Frequently asked questions
What is 1 Kilometer/Hour in Mile/Hour?
1 Kilometer/Hour (km/h) is 0.6213711922 Mile/Hour (mph).
What is 1 Mile/Hour in Kilometer/Hour?
1 Mile/Hour (mph) is 1.609344 Kilometer/Hour (km/h).
How do I convert Kilometer/Hour to Mile/Hour?
Multiply the value in Kilometer/Hour by 0.6213711922. For example, 5 km/h × 0.6213711922 = 3.106855961 mph. To go the other way, divide by 0.6213711922.
How many units does the speed converter support?
It converts between 7 units: Meter/Second, Kilometer/Hour, Mile/Hour, Knot, Foot/Second, Centimeter/Second, Mach.
What should I watch out for when converting speed?
Mach number depends on air temperature. This converter uses 343 m/s, the speed of sound in dry air at about 20 °C; at cruising altitude the real figure is lower.
More speed conversions
Full converter
For any other speed unit, use the full Speed Converter.