Kilometers Per Second Conversion

Speedometers are used in vehicles to measure speed

The kilometer per second 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 second.

Kilometer Per Second Conversion Calculators

Choose a unit of speed to convert to.

Convert kilometers per second to knots
1 kilometer per second is equal to 1,944 knots
Convert kilometers per second to Mach
1 kilometer per second is equal to 2.915452 Mach
Convert kilometers per second to speed of sound
1 kilometer per second is equal to 2.915452 speed of sound
Convert kilometers per second to speed of light
1 kilometer per second is equal to 3.3356E-6 speed of light
Convert kilometers per second to miles per hour
1 kilometer per second is equal to 2,237 miles per hour
Convert kilometers per second to feet per second
1 kilometer per second is equal to 3,281 feet per second
Convert kilometers per second to kilometers per hour
1 kilometer per second is equal to 3,600 kilometers per hour
Convert kilometers per second to meters per second
1 kilometer per second is equal to 1,000 meters per second
Convert kilometers per second to centimeters per second
1 kilometer per second is equal to 100,000 centimeters per second

Kilometer Per Second Definition and Usage

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

The kilometer per second, or kilometre per second, is an SI unit of speed in the metric system. Kilometers per second can be abbreviated as km/s, and are also sometimes abbreviated as km/sec. For example, 1 kilometer per second can be written as 1 km/s or 1 km/sec.

Kilometers per second can be expressed using the formula:
vkm/s = dkmtsec

The velocity in kilometers per second is equal to the distance in kilometers divided by time in seconds.

Kilometers Per Second Measurement Conversion Table

Common kilometer per second values and equivalent imperial and metric speed measurements
kilometers per second knots Mach speed of sound speed of light miles per hour feet per second kilometers per hour meters per second centimeters per second
1 km/s 1,944 kn Mach 2.915452 2.915452 0.0000033356 c 2,237 mph 3,281 ft/s 3,600 km/h 1,000 m/s 100,000 cm/s
2 km/s 3,888 kn Mach 5.830904 5.830904 0.0000066713 c 4,474 mph 6,562 ft/s 7,200 km/h 2,000 m/s 200,000 cm/s
3 km/s 5,832 kn Mach 8.746356 8.746356 0.000010007 c 6,711 mph 9,843 ft/s 10,800 km/h 3,000 m/s 300,000 cm/s
4 km/s 7,775 kn Mach 11.661808 11.661808 0.000013343 c 8,948 mph 13,123 ft/s 14,400 km/h 4,000 m/s 400,000 cm/s
5 km/s 9,719 kn Mach 14.577259 14.577259 0.000016678 c 11,185 mph 16,404 ft/s 18,000 km/h 5,000 m/s 500,000 cm/s
6 km/s 11,663 kn Mach 17.492711 17.492711 0.000020014 c 13,422 mph 19,685 ft/s 21,600 km/h 6,000 m/s 600,000 cm/s
7 km/s 13,607 kn Mach 20.408163 20.408163 0.000023349 c 15,659 mph 22,966 ft/s 25,200 km/h 7,000 m/s 700,000 cm/s
8 km/s 15,551 kn Mach 23.323615 23.323615 0.000026685 c 17,895 mph 26,247 ft/s 28,800 km/h 8,000 m/s 800,000 cm/s
9 km/s 17,495 kn Mach 26.239067 26.239067 0.000030021 c 20,132 mph 29,528 ft/s 32,400 km/h 9,000 m/s 900,000 cm/s
10 km/s 19,438 kn Mach 29.154519 29.154519 0.000033356 c 22,369 mph 32,808 ft/s 36,000 km/h 10,000 m/s 1,000,000 cm/s
11 km/s 21,382 kn Mach 32.069971 32.069971 0.000036692 c 24,606 mph 36,089 ft/s 39,600 km/h 11,000 m/s 1,100,000 cm/s
12 km/s 23,326 kn Mach 34.985423 34.985423 0.000040028 c 26,843 mph 39,370 ft/s 43,200 km/h 12,000 m/s 1,200,000 cm/s
13 km/s 25,270 kn Mach 37.900875 37.900875 0.000043363 c 29,080 mph 42,651 ft/s 46,800 km/h 13,000 m/s 1,300,000 cm/s
14 km/s 27,214 kn Mach 40.816327 40.816327 0.000046699 c 31,317 mph 45,932 ft/s 50,400 km/h 14,000 m/s 1,400,000 cm/s
15 km/s 29,158 kn Mach 43.731778 43.731778 0.000050035 c 33,554 mph 49,213 ft/s 54,000 km/h 15,000 m/s 1,500,000 cm/s
16 km/s 31,102 kn Mach 46.64723 46.64723 0.00005337 c 35,791 mph 52,493 ft/s 57,600 km/h 16,000 m/s 1,600,000 cm/s
17 km/s 33,045 kn Mach 49.562682 49.562682 0.000056706 c 38,028 mph 55,774 ft/s 61,200 km/h 17,000 m/s 1,700,000 cm/s
18 km/s 34,989 kn Mach 52.478134 52.478134 0.000060042 c 40,265 mph 59,055 ft/s 64,800 km/h 18,000 m/s 1,800,000 cm/s
19 km/s 36,933 kn Mach 55.393586 55.393586 0.000063377 c 42,502 mph 62,336 ft/s 68,400 km/h 19,000 m/s 1,900,000 cm/s
20 km/s 38,877 kn Mach 58.309038 58.309038 0.000066713 c 44,739 mph 65,617 ft/s 72,000 km/h 20,000 m/s 2,000,000 cm/s