Mile/Hour to Kilometer/Hour Conversion
1 Mile/Hour (mph) equals 1.609344 Kilometer/Hour (km/h).
1 Mile/Hour = 1.609344 Kilometer/Hour
How to convert Mile/Hour to Kilometer/Hour
Multiply the value in Mile/Hour by 1.609344 to get Kilometer/Hour. To convert back from Kilometer/Hour to Mile/Hour, divide by 1.609344 — or multiply by 0.6213711922.
km/h = mph × 1.609344
Example: 25 mph × 1.609344 = 40.2336 km/h.
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.
Mile/Hour to Kilometer/Hour conversion table
| Mile/Hour (mph) | Kilometer/Hour (km/h) |
|---|---|
| 1 | 1.609344 |
| 2 | 3.218688 |
| 3 | 4.828032 |
| 4 | 6.437376 |
| 5 | 8.04672 |
| 10 | 16.09344 |
| 15 | 24.14016 |
| 20 | 32.18688 |
| 25 | 40.2336 |
| 50 | 80.4672 |
| 75 | 120.7008 |
| 100 | 160.9344 |
| 250 | 402.336 |
| 500 | 804.672 |
| 1,000 | 1,609.344 |
Frequently asked questions
What is 1 Mile/Hour in Kilometer/Hour?
1 Mile/Hour (mph) is 1.609344 Kilometer/Hour (km/h).
What is 1 Kilometer/Hour in Mile/Hour?
1 Kilometer/Hour (km/h) is 0.6213711922 Mile/Hour (mph).
How do I convert Mile/Hour to Kilometer/Hour?
Multiply the value in Mile/Hour by 1.609344. For example, 5 mph × 1.609344 = 8.04672 km/h. To go the other way, divide by 1.609344.
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
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For any other speed unit, use the full Speed Converter.