Kilometers per Hour to Miles per Hour (km/h to mph) Converter
Convert km/h to mph and mph to km/h instantly.
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km/h to mph – Instant Calculator
Kilometers per Hour (km/h)
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Miles per Hour (mph)
Common Conversion Examples
10 km/h = 6.21371 mph
10 km/h = 6.21371 mph
50 km/h = 31.0686 mph
50 km/h = 31.0686 mph
100 km/h = 62.1371 mph
100 km/h = 62.1371 mph
120 km/h = 74.5645 mph
120 km/h = 74.5645 mph
km/h to mph: Definition, History, Uses, and Examples
Definition
Kilometers per hour (km/h) is the metric unit for speed, while miles per hour (mph) is the imperial/US customary unit. The km/h to mph formula is: mph = km/h × 0.621371. Use this quick kmh to mph converter for UK car speed,driving speed limits km/h to mph, and fitness bike speed in mph.
Origin or History
The kilometer was introduced during French metrication; the mile predates it by centuries. Many countries switched to km/h on signs and dashboards; the US retained mph. Hence searches like convert 120 km/h to mph, 70 km/h in mph, and km/h vs mph difference are frequent.
Current Use
- Automotive: speed limit km/h to mph, dash conversions for imported vehicles.
- Sports: cycling and running apps often show km/h; users compare in mph.
- Maps & GPS: quick checks like 100 km/h in mph for international routes.
Examples
| km/h | mph | Example Use |
|---|---|---|
| 10 | 6.21371 | Slow jog |
| 50 | 31.0686 | Urban speed limit |
| 100 | 62.1371 | Highway speed |
| 120 | 74.5645 | German autobahn |
Also searched
- kmh to mph chart printable
- 120 km/h to mph calculator
- average cycling speed km/h to mph
- driving speed limits km/h vs mph by country
Frequently Asked Questions
How do I convert km/h to mph?
Multiply km/h by 0.621371. Example: 100 km/h × 0.621371 = 62.1371 mph.
How do I convert mph to km/h?
Multiply mph by 1.60934. Example: 60 mph × 1.60934 = 96.5604 km/h.
Is km/h to mph used for driving?
Yes, speed limits and car speedometers often use both units for international travel.
What is 120 km/h in mph?
120 × 0.621371 = 74.5645 mph.
Why do some countries use mph and others km/h?
It’s historical: the US and UK inherited mph; most of the world standardized on metric km/h.