Speed Converter

Convert between MPH, KPH, Knots, Mach, and Meter per Second.

How to use this Speed Converter

This tool helps you convert speed values between various units commonly used in driving, aviation, and marine navigation.

Common Units

  • MPH (mi/h): Standard speed unit in the US and UK.
  • KPH (km/h): Standard speed unit in most countries.
  • Knot (kn): Used in aviation and maritime. 1 kn = 1.15 mph.
  • Mach: Ratio of speed to the speed of sound.