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Speed Converter

Convert between 7 speed units including meters per second, kilometers per hour, miles per hour, feet per second and more. Accurate factors, instant results.

Enter values

Results update as you type.

Result

Miles per hour

0.621371 mph

1 km/h = 0.621371 mph

1 km/h in every speed unit

UnitValue
Meters per second (m/s)0.277778
Kilometers per hour (km/h)1
Miles per hour (mph)0.621371
Feet per second (ft/s)0.911344
Knots (kn)0.539957
Mach (sea level, 15 °C) (Ma)0.00081629
Speed of light (c)9.265669 × 10^-10

About the Speed Converter

Convert between 7 speed units including meters per second, kilometers per hour, miles per hour, feet per second and more. Accurate factors, instant results.

Also known as: speed unit converter, speed conversion, velocity converter, kmh mph converter, convert speed units.

How to use this calculator

  1. Enter value, from, to.
  2. The result updates instantly as you type — press Calculate (or Enter) at any time.
  3. Review the breakdown shown under the main result.
  4. Use Copy result or Share to save the answer or send a link with your inputs.

Worked example

Using the values pre-filled in the calculator above:

  • Value = 1
  • From: Kilometers per hour (km/h)
  • To: Miles per hour (mph)

the calculator returns:

  • Miles per hour: 0.621371 mph