Kilometers per Hour Conversion Calculator
Enter a value in kilometers per hour below to convert to another unit of speed.
Do you want to convert kilometers per hour to miles per hour?
What Are Kilometers per Hour?
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Kilometers per hour are a measurement of speed.
The kilometer per hour, or kilometre per hour, is an SI unit of speed in the metric system. Kilometers per hour can be abbreviated as km/h, and are also sometimes abbreviated as kph. For example, 1 kilometer per hour can be written as 1 km/h or 1 kph.
In the expressions of units, the slash, or solidus (/), is used to express a change in one or more units relative to a change in one or more other units.[1] For example, km/h is expressing a change in length or distance relative to a change in time.
Kilometers per hour can be expressed using the formula:
vkm/h = dkm / thr
The velocity in kilometers per hour is equal to the distance in kilometers divided by time in hours.
How Fast is a Kilometer per Hour?
Kilometers per hour are a measurement of speed expressing the distance traveled in kilometers in one hour.
How to Convert Kilometers per Hour
To convert kilometers per hour to another unit of speed, you need to multiply the value by a conversion factor. A conversion factor is a numerical value used to change the units of a measurement without changing the value.[2]
You can find the conversion factors for kilometers per hour in the conversion table below.
Then, multiply the speed measurement by the conversion factor to find the equivalent value in the desired unit of measurement.
kilometers per hour × conversion factor = result
You can also use a calculator, such as one of the converters below, for the conversion.
Kilometers per Hour Conversion Table
| kilometers per hour | knots | Mach number | speed of sound | speed of light | miles per hour | feet per second | kilometers per second | meters per second | centimeters per second |
|---|---|---|---|---|---|---|---|---|---|
| 1 km/h | 0.539957 kn | Mach 0.00081 | 0.00081 sound | 0.00000000092657 c | 0.621371 mph | 0.911344 ft/s | 0.000278 km/s | 0.277778 m/s | 27.777778 cm/s |
| 2 km/h | 1.079914 kn | Mach 0.00162 | 0.00162 sound | 0.0000000018531 c | 1.242742 mph | 1.822689 ft/s | 0.000556 km/s | 0.555556 m/s | 55.555556 cm/s |
| 3 km/h | 1.61987 kn | Mach 0.00243 | 0.00243 sound | 0.0000000027797 c | 1.864114 mph | 2.734033 ft/s | 0.000833 km/s | 0.833333 m/s | 83.333333 cm/s |
| 4 km/h | 2.159827 kn | Mach 0.003239 | 0.003239 sound | 0.0000000037063 c | 2.485485 mph | 3.645378 ft/s | 0.001111 km/s | 1.111111 m/s | 111.111111 cm/s |
| 5 km/h | 2.699784 kn | Mach 0.004049 | 0.004049 sound | 0.0000000046328 c | 3.106856 mph | 4.556722 ft/s | 0.001389 km/s | 1.388889 m/s | 138.888889 cm/s |
| 6 km/h | 3.239741 kn | Mach 0.004859 | 0.004859 sound | 0.0000000055594 c | 3.728227 mph | 5.468066 ft/s | 0.001667 km/s | 1.666667 m/s | 166.666667 cm/s |
| 7 km/h | 3.779698 kn | Mach 0.005669 | 0.005669 sound | 0.000000006486 c | 4.349598 mph | 6.379411 ft/s | 0.001944 km/s | 1.944444 m/s | 194.444444 cm/s |
| 8 km/h | 4.319654 kn | Mach 0.006479 | 0.006479 sound | 0.0000000074125 c | 4.97097 mph | 7.290755 ft/s | 0.002222 km/s | 2.222222 m/s | 222.222222 cm/s |
| 9 km/h | 4.859611 kn | Mach 0.007289 | 0.007289 sound | 0.0000000083391 c | 5.592341 mph | 8.2021 ft/s | 0.0025 km/s | 2.5 m/s | 250 cm/s |
| 10 km/h | 5.399568 kn | Mach 0.008098 | 0.008098 sound | 0.0000000092657 c | 6.213712 mph | 9.113444 ft/s | 0.002778 km/s | 2.777778 m/s | 277.777778 cm/s |
| 11 km/h | 5.939525 kn | Mach 0.008908 | 0.008908 sound | 0.000000010192 c | 6.835083 mph | 10.024789 ft/s | 0.003056 km/s | 3.055556 m/s | 305.555556 cm/s |
| 12 km/h | 6.479482 kn | Mach 0.009718 | 0.009718 sound | 0.000000011119 c | 7.456454 mph | 10.936133 ft/s | 0.003333 km/s | 3.333333 m/s | 333.333333 cm/s |
| 13 km/h | 7.019438 kn | Mach 0.010528 | 0.010528 sound | 0.000000012045 c | 8.077825 mph | 11.847477 ft/s | 0.003611 km/s | 3.611111 m/s | 361.111111 cm/s |
| 14 km/h | 7.559395 kn | Mach 0.011338 | 0.011338 sound | 0.000000012972 c | 8.699197 mph | 12.758822 ft/s | 0.003889 km/s | 3.888889 m/s | 388.888889 cm/s |
| 15 km/h | 8.099352 kn | Mach 0.012148 | 0.012148 sound | 0.000000013899 c | 9.320568 mph | 13.670166 ft/s | 0.004167 km/s | 4.166667 m/s | 416.666667 cm/s |
| 16 km/h | 8.639309 kn | Mach 0.012958 | 0.012958 sound | 0.000000014825 c | 9.941939 mph | 14.581511 ft/s | 0.004444 km/s | 4.444444 m/s | 444.444444 cm/s |
| 17 km/h | 9.179266 kn | Mach 0.013767 | 0.013767 sound | 0.000000015752 c | 10.56331 mph | 15.492855 ft/s | 0.004722 km/s | 4.722222 m/s | 472.222222 cm/s |
| 18 km/h | 9.719222 kn | Mach 0.014577 | 0.014577 sound | 0.000000016678 c | 11.184681 mph | 16.404199 ft/s | 0.005 km/s | 5 m/s | 500 cm/s |
| 19 km/h | 10.259179 kn | Mach 0.015387 | 0.015387 sound | 0.000000017605 c | 11.806053 mph | 17.315544 ft/s | 0.005278 km/s | 5.277778 m/s | 527.777778 cm/s |
| 20 km/h | 10.799136 kn | Mach 0.016197 | 0.016197 sound | 0.000000018531 c | 12.427424 mph | 18.226888 ft/s | 0.005556 km/s | 5.555556 m/s | 555.555556 cm/s |
Kilometers per Hour Conversion Calculators
You can also convert speed using one of our kilometers per hour converters below.
- kilometers per hour to knots converter
- kilometers per hour to Mach number converter
- kilometers per hour to speed of sound converter
- kilometers per hour to speed of light converter
- kilometers per hour to miles per hour converter
- kilometers per hour to feet per second converter
- kilometers per hour to kilometers per second converter
- kilometers per hour to meters per second converter
- kilometers per hour to centimeters per second converter
References
- National Institute of Standards and Technology, NIST Guide to the SI, Chapter 6: Rules and Style Conventions for Printing and Using Units, https://www.nist.gov/pml/special-publication-811/nist-guide-si-chapter-6-rules-and-style-conventions-printing-and-using
- National Institute of Standards & Technology, Unit Conversion, https://www.nist.gov/pml/owm/metric-si/unit-conversion