Kilometers per Second to Kilometers per Hour

How to convert kilometers per second to kilometers per hour

Formulakm/h = km/s × 3,600

Multiply the value in kilometers per second by 3,600. To go the other way, multiply by 0.0002777777778 (or divide by 3,600).

A kilometer per second is larger than a kilometer per hour: one kilometer per second contains 3,600 kilometers per hour.

Worked examples

1 kilometer per second1 km/s × 3,600 = 3,600 km/h
5 kilometers per second5 km/s × 3,600 = 18,000 km/h
10 kilometers per second10 km/s × 3,600 = 36,000 km/h
20 kilometers per second20 km/s × 3,600 = 72,000 km/h
100 kilometers per second100 km/s × 3,600 = 360,000 km/h

Kilometers per second to kilometers per hour conversion table

Values are calculated by the conversion engine and rounded to 8 significant figures.

Kilometers per second to kilometers per hour: 0.1–10 km/s
Kilometers per second (km/s)	Kilometers per hour (km/h)
0.1 km/s	360 km/h
0.25 km/s	900 km/h
0.5 km/s	1,800 km/h
1 km/s	3,600 km/h
2 km/s	7,200 km/h
3 km/s	10,800 km/h
4 km/s	14,400 km/h
5 km/s	18,000 km/h
6 km/s	21,600 km/h
7 km/s	25,200 km/h
8 km/s	28,800 km/h
9 km/s	32,400 km/h
10 km/s	36,000 km/h

Kilometers per second to kilometers per hour: 12–1,000 km/s
Kilometers per second (km/s)	Kilometers per hour (km/h)
12 km/s	43,200 km/h
15 km/s	54,000 km/h
20 km/s	72,000 km/h
25 km/s	90,000 km/h
30 km/s	108,000 km/h
40 km/s	144,000 km/h
50 km/s	180,000 km/h
75 km/s	270,000 km/h
100 km/s	360,000 km/h
250 km/s	900,000 km/h
500 km/s	1,800,000 km/h
1,000 km/s	3,600,000 km/h

About the units

Kilometer per second (km/s)

The kilometer per second (km/s) is a unit of speed in the International System of Units (SI). One kilometer per second equals 1,000 meters per second (m/s).

Kilometer per hour (km/h)

The road-speed unit in most of the world. Divide by 3.6 for m/s; 100 km/h is about 62 mph. One kilometer per hour equals 0.2777777778 meters per second (m/s).

Frequently asked questions

How many kilometers per hour are in one kilometer per second?

There are 3,600 kilometers per hour in one kilometer per second, and this value is exact by definition.

How do I convert kilometers per second to kilometers per hour?

Multiply the number of kilometers per second by 3,600. For example, 10 km/s × 3,600 = 36,000 km/h.

How many kilometers per second are in one kilometer per hour?

One kilometer per hour equals 0.0002777777778 kilometers per second. That is the reverse factor, 1 ÷ 3,600.

What is 10 kilometers per second in kilometers per hour?

10 km/s = 36,000 km/h.

Is this km/s to km/h converter accurate?

Yes. Both units are defined exactly in terms of SI units, so the conversion factor is exact; results are shown to 12 significant figures by default and you can change precision in the converter. Calculations run in your browser using the same tested engine that generated this page.

Kilometers per Second to Kilometers per Hour Converter