mph to km/h Calculator
📚 Examples, Formula, and How To
📝 mph to km/h Formula
mph to km/h
km/h = mph × 1.609344Multiply the speed in miles per hour by 1.609344 to get kilometers per hour
km/h to mph
mph = km/h ÷ 1.609344Divide the speed in kilometers per hour by 1.609344 to get miles per hour
💡 Converting mph to km/h
Example 1
Convert: 60 mph to km/h
Start with the conversion formula: km/h = mph × 1.609344
Substitute the value: km/h = 60 × 1.609344
Calculate: 60 × 1.609344 = 96.56
Example 2
Convert: 100 km/h to mph
Start with the conversion formula: mph = km/h ÷ 1.609344
Substitute the value: mph = 100 ÷ 1.609344
Calculate: 100 ÷ 1.609344 = 62.14
📊 mph to km/h Conversion Table
Common mph to km/h Conversions
| mph | km/h |
|---|---|
| 10 mph | 16.1 km/h |
| 20 mph | 32.2 km/h |
| 30 mph | 48.3 km/h |
| 40 mph | 64.4 km/h |
| 50 mph | 80.5 km/h |
| 60 mph | 96.6 km/h |
| 70 mph | 112.7 km/h |
| 80 mph | 128.7 km/h |
| 100 mph | 160.9 km/h |
All values are rounded to 4 decimal places for practical use
⚙️ How to Convert mph to km/h
Conversion Factor
1 mph equals 1.609344 km/h
This is the standard conversion factor between imperial and metric speed.
mph to km/h
Multiply mph by 1.609344 to get km/h
Enter a value in the mph field to convert to km/h.
km/h to mph
Divide km/h by 1.609344 to get mph
Enter a value in the km/h field to convert to mph.
📚 What are mph and km/h?
📏 Miles per Hour(mph)
Definition:
Miles per hour is a unit of speed expressing the number of miles traveled in one hour. It is commonly used in the United States and United Kingdom.
History:
Miles per hour has been used since horse-drawn vehicles and became standardized with the development of automobiles in the early 20th century.
Common Uses:
- Vehicle speedometers in the US and UK
- Speed limits and traffic regulations
- Aviation speeds for small aircraft
- Sports and racing measurements
- Marine navigation and boat speeds
Fun Fact:
The first speed limit was 10 mph in the UK in 1861! Today, some highways in Texas have speed limits of 85 mph (137 km/h).
📏 Kilometers per Hour(km/h)
Definition:
Kilometers per hour is a unit of speed expressing the number of kilometers traveled in one hour. It is the standard unit of speed in most countries.
History:
The km/h unit became widely used with the adoption of the metric system in the 19th and 20th centuries. It replaced various local speed measurements.
Common Uses:
- Vehicle speedometers in metric countries
- Speed limits on roads and highways
- Weather reports for wind speed
- Athletic performance measurements
- Transportation planning and logistics
Fun Fact:
The fastest land animal, the cheetah, can run at speeds up to 120 km/h! Most cars have speedometers that go up to 200+ km/h.