Speed Converter
Convert speed units: km/h, mph, m/s, knot, and Mach
Full Speed Conversion Table
Meter/Second (m/s)
0.2777777778
Kilometer/Hour (km/h)
1
Mile/Hour (mph)
0.6213711922
Knot (kn)
0.5399572699
Mach (Mach)
0.0008162972105
How to Convert Speed
Enter the speed value and select units. Instantly calculates km/h↔mph, knot↔km/h, and more.
What are km/h, mph, and knot?
km/h (kilometers per hour) is used on car speedometers. mph (miles per hour) is used in the US and UK. Knot is used in aviation and maritime: 1 knot = 1.852 km/h.
Frequently Asked Questions
How many mph is 100 km/h?
100 km/h is approximately 62.14 mph.
How many km/h is 1 knot?
1 knot is exactly 1.852 km/h.
How many km/h is Mach 1?
Mach 1 is the speed of sound, approximately 1,235 km/h (at 15°C).
How many km/h is 60 mph?
60 mph is approximately 96.56 km/h.
What is the m/s and km/h conversion formula?
m/s → km/h: × 3.6. km/h → m/s: ÷ 3.6.