Speed Converter — km/h, mph, m/s, knots
Convert speed between metric (km/h, m/s), imperial (mph, ft/s), maritime (knots) and even Mach numbers.
Questions
How do I convert km/h to mph?
Divide km/h by 1.609. For example, 100 km/h ÷ 1.609 ≈ 62.14 mph.
What is a knot?
A knot is one nautical mile per hour (≈ 1.852 km/h or 1.151 mph). It's the standard speed unit in maritime and aviation contexts.
What speed is Mach 1?
Mach 1 is the speed of sound, approximately 343 m/s (1,235 km/h or 767 mph) in dry air at 20 °C.