Knots to Kilometers per Second Converter

How to convert knots to kilometers per second

Formulakm/s = kn × 0.0005144444444

Multiply the value in knots by 0.0005144444444. To go the other way, multiply by 1,943.844492 (or divide by 0.0005144444444).

A knot is smaller than a kilometer per second: it takes 1,943.844492 knots to make one kilometer per second.

Worked examples

1 knot1 kn × 0.0005144444444 = 0.0005144444444 km/s
5 knots5 kn × 0.0005144444444 = 0.002572222222 km/s
10 knots10 kn × 0.0005144444444 = 0.005144444444 km/s
20 knots20 kn × 0.0005144444444 = 0.01028888889 km/s
100 knots100 kn × 0.0005144444444 = 0.05144444444 km/s

Knots to kilometers per second conversion table

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

Knots to kilometers per second: 0.1–10 kn
Knots (kn)	Kilometers per second (km/s)
0.1 kn	0.000051444444 km/s
0.25 kn	0.00012861111 km/s
0.5 kn	0.00025722222 km/s
1 kn	0.00051444444 km/s
2 kn	0.0010288889 km/s
3 kn	0.0015433333 km/s
4 kn	0.0020577778 km/s
5 kn	0.0025722222 km/s
6 kn	0.0030866667 km/s
7 kn	0.0036011111 km/s
8 kn	0.0041155556 km/s
9 kn	0.00463 km/s
10 kn	0.0051444444 km/s

Knots to kilometers per second: 12–1,000 kn
Knots (kn)	Kilometers per second (km/s)
12 kn	0.0061733333 km/s
15 kn	0.0077166667 km/s
20 kn	0.010288889 km/s
25 kn	0.012861111 km/s
30 kn	0.015433333 km/s
40 kn	0.020577778 km/s
50 kn	0.025722222 km/s
75 kn	0.038583333 km/s
100 kn	0.051444444 km/s
250 kn	0.12861111 km/s
500 kn	0.25722222 km/s
1,000 kn	0.51444444 km/s

About the units

Knot (kn)

One nautical mile per hour (about 1.15 mph). The standard speed unit for ships, aircraft and wind reports. One knot equals 0.5144444444 meters per second (m/s).

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).

Frequently asked questions

How many kilometers per second are in one knot?

There are 0.0005144444444 kilometers per second in one knot, and this value is exact by definition.

How do I convert knots to kilometers per second?

Multiply the number of knots by 0.0005144444444. For example, 10 kn × 0.0005144444444 = 0.005144444444 km/s.

How many knots are in one kilometer per second?

One kilometer per second equals 1,943.844492 knots. That is the reverse factor, 1 ÷ 0.0005144444444.

What is 10 knots in kilometers per second?

10 kn = 0.005144444444 km/s.

Is this kn to km/s 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.