km/h to Knots Converter

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Convert kilometers per hour to knots at the rate 1 km/h ≈ 0.5400 knot (inverse of 1 knot = 1.852 km/h). Useful when metric weather or vehicle data needs to be expressed in the maritime/aviation knot convention. Anchors: 50 km/h ≈ 27.0 kn, 100 km/h ≈ 54.0 kn, 200 km/h ≈ 108.0 kn. Browser-local.

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

Kilometer per hour (km/h) → Knot (kn)

Quick reference table

Kilometer per hour (km/h)Knot (kn)
10 km/h5.3996 kn
25 km/h13.4989 kn
50 km/h26.9978 kn
60 km/h32.3974 kn
80 km/h43.1965 kn
100 km/h53.9957 kn
120 km/h64.7948 kn
150 km/h80.9935 kn
200 km/h107.9914 kn

Glossary

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.

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.

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.

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