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km/h (kmh) → m/s (ms)

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Use our free online converter to convert between units instantly. Enter any value in the field above to get accurate results. No signup or download required—all conversions run in your browser. Our calculator uses standard conversion factors for reliability.

0
kmh=ms
1=0.277778
5=1.388889
10=2.777778
20=5.555556
50=13.888889
100=27.777778
120=33.333333
200=55.555556

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Brief explanation: km/h to m/s

km/h is the most common unit globally. m/s is used in physics. mph is standard in the USA. Knot is used in aviation and maritime. Walking speed is about 5 km/h, a car on a highway ~100 km/h. Speed of sound is about 343 m/s. To convert km/h to mph, multiply by 0.621. To convert mph to km/h, multiply by 1.609. Our converter handles all these units accurately.

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Common conversion examples: km/h to m/s

Reference values for quick comparison. Use the converter above for any amount.

  • 1 km/h=0.2778 m/s
  • 50 km/h=13.8889 m/s
  • 100 km/h=27.7778 m/s

About the Units

km/h (kmh)

Definition: Kilometers per hour (km/h) is a unit of speed. It measures distance traveled in kilometers per hour. It is the standard speed unit in most countries and for vehicles worldwide.
History: km/h became standard with the metric system. It is used on speedometers in most countries. Road signs and speed limits use km/h except in the US and UK.
Current use: km/h is used for vehicle speed, wind speed, and athletic performance. Speed limits and odometers use km/h in metric countries. 100 km/h ≈ 62 mph.

m/s (ms)

Definition: Meters per second (m/s) is the SI unit of speed. It measures distance in meters traveled per second. It is used in physics, engineering, and scientific applications.
History: m/s is the derived SI unit for velocity. It is preferred in scientific contexts for consistency with other SI units. Wind speed in weather sometimes uses m/s.
Current use: m/s is used in physics, sports science, and wind measurements. Terminal velocity and projectile motion use m/s. One m/s ≈ 3.6 km/h.

Sources

Conversion factors and unit definitions follow international standards. For authoritative references, see: