Speed Converter
km/h, mph, knots, m/s — convert any speed instantly.
Inputs
Result
100 km/h =
62.1371
mile per hour (mph)
Visual breakdown
Meter per second
27.778
m/s
Mile per hour
62.137
mph
Knot
53.996
kn
Foot per second
91.134
ft/s
Formula
All speeds convert to meters per second first. 1 mph = 0.44704 m/s. 1 knot = 1.852 km/h.
Example
100 km/h ≈ 62.137 mph. 1 knot = 1.852 km/h.
Frequently asked
What is a knot?
One nautical mile per hour — used in aviation and marine navigation. 1 kn = 1.852 km/h exactly.
Land vs sea miles?
mph uses the statute mile (1.609 km). Knots use the nautical mile (1.852 km).
How precise is the result?
Display rounds to 4 decimals; the underlying math uses exact SI definitions.