Speed Converter
Convert kilometers per hour, miles per hour, meters per second, knots and other common speed units quickly and accurately.
Conversion Result
How to Use the Speed Converter
- Enter the speed you want to convert.
- Select the original speed unit.
- Select the destination speed unit.
- Click the Convert button.
Common Speed Conversion Formulas
Common Speed Conversions
- 10 km/h ≈ 6.21371 mph
- 20 km/h ≈ 12.4274 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
- 1 m/s = 3.6 km/h
About Speed Units
Kilometers per hour (km/h) is commonly used for vehicle speeds in many countries around the world.
Miles per hour (mph) is commonly used for road speeds in the United States and the United Kingdom.
Meters per second (m/s) is an SI unit commonly used in science and engineering. Knots are commonly used in aviation and maritime navigation.
Mach expresses speed relative to the speed of sound. For this calculator, Mach 1 is approximated as 343 meters per second under standard reference conditions.
Frequently Asked Questions
How many mph is 100 km/h?
100 km/h is approximately 62.1371 mph.
How many km/h is 60 mph?
60 mph is approximately 96.5606 km/h.
How fast is one knot?
One knot is equal to 1.852 kilometers per hour.
What is Mach 1?
Mach 1 represents approximately the speed of sound. Its exact speed varies with conditions such as temperature and altitude. This calculator uses 343 m/s as a standard approximation.