Speed Converter
Convert kilometers per hour, miles per hour, meters per second, knots and other speed units quickly and accurately.
How is it calculated?
How does speed conversion work?
Speed measures distance traveled per unit of time. ConvertAll uses meters per second (m/s) as its reference unit. Each value is converted into meters per second and then into the selected destination unit using conversion factors. For example, 1 km/h equals 1/3.6 m/s, while 1 mile per hour equals exactly 0.44704 m/s. Knots are commonly used in maritime navigation and aviation. One knot equals exactly one nautical mile per hour, or 1.852 km/h.
Conversion examples
- 1 kilometer per hour = approximately 0.621371 miles per hour.
- 1 mile per hour = exactly 1.609344 kilometers per hour.
- 1 meter per second = exactly 3.6 kilometers per hour.
- 1 knot = exactly 1.852 kilometers per hour.
- 100 kilometers per hour = approximately 62.1371 miles per hour.
- 10 meters per second = exactly 36 kilometers per hour.
- 1 speed of light in vacuum = exactly 299,792,458 meters per second.
Frequently asked questions
How do you convert km/h to mph?
Divide the speed in kilometers per hour by 1.609344. For example, 100 km/h equals approximately 62.1371 mph.
How do you convert mph to km/h?
Multiply the speed in miles per hour by 1.609344. For example, 60 mph equals approximately 96.5606 km/h.
How many km/h are in one meter per second?
One meter per second equals exactly 3.6 kilometers per hour.
What is a knot in navigation?
A knot is a unit of speed used in maritime navigation and aviation. One knot equals exactly one nautical mile per hour, or 1.852 km/h.
How many knots are in 100 km/h?
100 kilometers per hour equals approximately 53.9957 knots.
What is the difference between km/h and m/s?
Both measure speed. Kilometers per hour are commonly used for road traffic and transport, while meters per second are the SI derived unit of speed. Multiply m/s by 3.6 to obtain km/h.
What is the speed of light?
The speed of light in vacuum is exactly 299,792,458 meters per second, approximately 1,079,252,849 km/h. Its symbol is c.
Can Mach be converted to km/h?
Yes, but the conversion depends on the local speed of sound, which varies with temperature and the medium. Mach therefore has no universal fixed conversion factor and is not included in this converter.