Knots to Kilometers per Hour

1 kn = 1.852 km/h

Knots to kilometers per hour helps sailors, pilots, and passengers understand marine and aviation speeds in road units. Boats, ships, and aircraft use knots worldwide, and marine and aviation weather often report wind in knots, so this conversion is common for anyone outside those fields.

From

When you need to convert knots to kilometers per hour

Understanding a boat or ferry cruising speed in road terms
Reading wind speeds in marine or aviation weather reports
Converting aircraft airspeeds for a general audience
Planning sailing or kitesurfing trips from a wind forecast in knots

How to convert knots to kilometers per hour

km/h = kn × 1.852

Example: 5 kn = 9.26 km/h

Common speeds

Knots (kn)	Kilometers per Hour (km/h)
5 kn	9.26 km/h
10 kn	18.52 km/h
15 kn	27.78 km/h
20 kn	37.04 km/h
25 kn	46.3 km/h
30 kn	55.56 km/h
40 kn	74.08 km/h
64 kn	118.528 km/h
150 kn	277.8 km/h
450 kn	833.4 km/h

Tips for converting knots to kilometers per hour

One knot is exactly 1.852 km/h, since a nautical mile is exactly 1,852 meters.
Doubling knots gives a quick upper estimate but overshoots by about 8%; double and subtract 7% for a close figure.
A knot is already a speed (nautical miles per hour), so "knots per hour" is incorrect.

Knots to Kilometers per Hour conversion table

Knots (kn)	Kilometers per Hour (km/h)
1 kn	1.852 km/h
2 kn	3.704 km/h
3 kn	5.556 km/h
4 kn	7.408 km/h
5 kn	9.26 km/h
6 kn	11.112 km/h
7 kn	12.964 km/h
8 kn	14.816 km/h
9 kn	16.668 km/h
10 kn	18.52 km/h
15 kn	27.78 km/h
20 kn	37.04 km/h
25 kn	46.3 km/h
30 kn	55.56 km/h
40 kn	74.08 km/h
50 kn	92.6 km/h
75 kn	138.9 km/h
100 kn	185.2 km/h
250 kn	463 km/h
500 kn	926 km/h
1,000 kn	1,852 km/h

About the units

Knots: The knot is one nautical mile (1,852 m) per hour, used in aviation, shipping and meteorology.

Kilometers per Hour: Kilometers per hour is the unit for road speed limits and vehicle speedometers in most countries.

Frequently asked questions

How many kilometers per hour are in 1 knot?

1 knot equals 1.852 kilometers per hour.

How many knots are in 1 kilometer per hour?

1 kilometer per hour equals 0.5399568 knots.

How do I convert knots to kilometers per hour?

Use the formula km/h = kn × 1.852.

What is 10 knots in kilometers per hour?

10 knots equals 18.52 kilometers per hour.

Related conversions

Factors: NIST SP 811 · SI Brochure · NIST Handbook 44 — Updated October 17, 2026