Kilometers per Hour to Miles per Hour Converter
Convert driving speed from km/h to mph.
Result
0
mph
1 km/h = 0.621371 mph
How to convert km/h to mph?
How many mph are in km/h? The relationship is:
- 1 km/h = 0.621371 mph
- 1 mph = 1.60934 km/h
To convert km/h to mph, multiply the value by 0.621371 (or divide by 1.60934).
Formula: mph = km/h × 0.621371
Step-by-Step Calculation
- Take the number of km/h you want to convert (e.g., 100).
- Multiply that value by 0.621371.
- The result is the value in mph. (Example: 100 × 0.621371 = 62.1371 mph).
How to use this converter?
Enter km/h and get mph instantly—perfect for driving speed limits, car dashboards, and travel planning.
Common km/h to mph Conversions
Quick reference guide for popular speeds.
10 km/h = 6.2137 mph
20 km/h = 12.4274 mph
30 km/h = 18.6411 mph
50 km/h = 31.0686 mph
60 km/h = 37.2823 mph
80 km/h = 49.7097 mph
100 km/h = 62.1371 mph
110 km/h = 68.3508 mph
120 km/h = 74.5645 mph
130 km/h = 80.7782 mph
History: km/h vs mph
Kilometers per hour (km/h) is widely used in countries that use the metric system, while miles per hour (mph) is mainly used in the United States and the United Kingdom for road speeds.
Common km/h to mph Conversions
| km/h Input | mph Result |
|---|---|
| 10 km/h | 6.2137 mph |
| 20 km/h | 12.4274 mph |
| 30 km/h | 18.6411 mph |
| 50 km/h | 31.0686 mph |
| 60 km/h | 37.2823 mph |
| 80 km/h | 49.7097 mph |
| 100 km/h | 62.1371 mph |
| 110 km/h | 68.3508 mph |
| 120 km/h | 74.5645 mph |
| 130 km/h | 80.7782 mph |
Frequently Asked Questions
How do I convert km/h to mph?
Multiply km/h by 0.621371 to get mph.
How many mph is 100 km/h?
100 km/h equals 62.1371 mph.
How many mph is 120 km/h?
120 km/h equals 74.5645 mph.
How do I convert mph back to km/h?
Multiply mph by 1.60934 to get km/h.
Is the conversion exact?
It’s standardized. Results may be rounded depending on decimals displayed.