Kilometers Per Hour Conversion

Speedometers are used in vehicles to measure speed

The kilometer per hour is a unit used to measure speed. Use one of the conversion calculators below to convert to another unit of measure, or read on to learn more about kilometers per hour.

Kilometer Per Hour Conversion Calculators

Choose a unit of speed to convert to.

Convert kilometers per hour to knots
1 kilometer per hour is equal to 0.539957 knots
Convert kilometers per hour to Mach
1 kilometer per hour is equal to 0.00081 Mach
Convert kilometers per hour to speed of sound
1 kilometer per hour is equal to 0.00081 speed of sound
Convert kilometers per hour to speed of light
1 kilometer per hour is equal to 9.2657E-10 speed of light
Convert kilometers per hour to miles per hour
1 kilometer per hour is equal to 0.621371 miles per hour
Convert kilometers per hour to feet per second
1 kilometer per hour is equal to 0.911344 feet per second
Convert kilometers per hour to kilometers per second
1 kilometer per hour is equal to 0.000278 kilometers per second
Convert kilometers per hour to meters per second
1 kilometer per hour is equal to 0.277778 meters per second
Convert kilometers per hour to centimeters per second
1 kilometer per hour is equal to 27.777778 centimeters per second

Kilometer Per Hour Definition and Usage

Kilometers per hour are a measurement of speed expressing the distance travelled in kilometers in one hour.

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.

Kilometers per hour can be expressed using the formula:
vkm/s = dkmthr

The velocity in kilometers per hour is equal to the distance in kilometers divided by time in hours.

Kilometers Per Hour Measurement Conversion Table

Common kilometer per hour values and equivalent imperial and metric speed measurements
kilometers per hour knots Mach 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 0.000000018531 c 12.427424 mph 18.226888 ft/s 0.005556 km/s 5.555556 m/s 555.555556 cm/s