Speed Converter
Convert between km/h, mph, m/s, knots, and Mach.
Processed on your device — never uploaded
All Conversions
Kilometers per hour (km/h)100
Miles per hour (mph)62.137119
Meters per second (m/s)27.777778
Knots (kn)53.995727
Mach0.080985
Frequently Asked Questions
How do I convert km/h to mph?
Multiply kilometers per hour by 0.6214 to get miles per hour. For example, 100 km/h equals approximately 62.14 mph.
What speed is Mach 1?
Mach 1 is the speed of sound, approximately 343 m/s (1,235 km/h or 767 mph) at sea level and 20 degrees Celsius.
What are knots and who uses them?
A knot is one nautical mile per hour (about 1.852 km/h or 1.151 mph). Knots are used in aviation and maritime navigation worldwide.