Knots to km/h Converter

🔒 Runs in your browser — nothing is sent to a server

Convert knots to kilometers per hour at the exact rate 1 knot = 1.852 km/h (since one nautical mile is exactly 1,852 m). Useful when marine forecasts or aviation cruise speeds in knots need to be expressed in metric km/h. Anchors: 30 kn = 55.56 km/h, 50 kn = 92.60 km/h, 480 kn = 888.96 km/h (airliner cruise). Browser-local.

Knot (kn)
Kilometer per hour (km/h)

Knot (kn) → Kilometer per hour (km/h)

Quick reference table

Knot (kn)Kilometer per hour (km/h)
10 kn18.52 km/h
25 kn46.3 km/h
50 kn92.6 km/h
60 kn111.12 km/h
80 kn148.16 km/h
100 kn185.2 km/h
120 kn222.24 km/h
150 kn277.8 km/h
200 kn370.4 km/h

Glossary

Knot (kn)

A knot is one nautical mile per hour, used in maritime navigation, aviation and meteorology. 1 knot = 1.852 km/h = 1.1508 mph = 0.5144 m/s. The unit comes from the practice of measuring ship speed by counting knots on a rope let out behind the vessel. Modern airliners cruise at about 470–510 knots; ocean currents at 1–4 knots.

Kilometer per hour (km/h)

A kilometer per hour is the everyday speed unit used on road signs, vehicle speedometers and weather forecasts in nearly every country except the United States and the United Kingdom. 1 km/h = 0.2778 m/s = 0.6214 mph. Highway speed limits are commonly 100–130 km/h; a marathon world record pace is about 21 km/h.

Metric / SI speed

In the metric system, speed is reported in meters per second (scientific) or kilometers per hour (everyday). The relation is exact: 1 m/s = 3.6 km/h. Most countries use km/h on road signs and speedometers; m/s appears in physics, engineering, weather data and athletics where fine-resolution timing matters.

Imperial / US Customary speed

In the United States, the United Kingdom and a few other countries, road speeds are reported in miles per hour (mph). US engineering also uses feet per second (ft/s). 1 mph = 1.6093 km/h = 0.4470 m/s. Maritime and aviation worldwide use knots (1 knot = 1.852 km/h), independent of the metric/imperial divide.

Related tools

km/h to Knots
Convert km/h to knots — 1 km/h ≈ 0.5400 knot
Knots to mph
Convert knots to mph — 1 knot ≈ 1.1508 mph
Knots to m/s
Convert knots to m/s — 1 knot ≈ 0.5144 m/s
Speed Converter
Convert speed — m/s, km/h, mph, knots, ft/s, mach