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Meter per Second Converter

Convert meters per second (m/s) to km/h, mph, knots, feet per second and Mach.

What this tool does

Convert meters per second (m/s) to km/h, mph, knots, feet per second and Mach. Type an amount in meters per second, choose the units, and the tool converts it to kilometers per hour. It offers 6 speed units and also shows the same amount in the others.

Inputs

  • Value: A number.
  • From: Choose one: Meter per second, Kilometer per hour, Mile per hour, Knot, Foot per second, Mach (standard atmosphere, sea level, 15 °C). Starts as Meter per second.
  • To: Choose one of the same 6 units as "From". Starts as Kilometer per hour.

How to use

  1. Enter the amount you want to convert.
  2. Choose the unit to convert from and the unit to convert to.
  3. Read the result: the converted amount and the same amount in the other units. It appears once every required field has a valid value.

Worked examples

Conversions from meters per second to kilometers per hour:

  • 1 m/s = 3.6 km/h
  • 5 m/s = 18 km/h
  • 10 m/s = 36 km/h
  • 50 m/s = 180 km/h
  • 100 m/s = 360 km/h

Multiply the number of meters per second by 3.6 to get kilometers per hour. Both units are exact definitions, so 3.6 is the exact factor: 1 m/s = 3.6 km/h.

Sources: Meter per second: SI Brochure, 9th edition (2019). Kilometer per hour: exact by definition.

Limitations

  • Mach here means the standard-atmosphere sea level value only. At altitude or in warmer or colder air, the same Mach number is a different speed.

FAQs

Q: How do I convert m/s to km/h?
A: Multiply by 3.6. One meter per second is exactly 3.6 km/h.
Q: How many mph is 1 m/s?
A: One meter per second is 2.23694 mph.
Q: Which Mach number does the page use?
A: Mach is shown at sea level in the ISO standard atmosphere at 15 °C, where the speed of sound is 340.294 m/s. The real speed of sound changes with air temperature and altitude.

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