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Conversion Formula:
Convert Knot to Kilometer per hour (knot to km/h) instantly with accurate, readable results.
Convert kilometers per hour, miles per hour, meters per second, and other units with our Speed Unit Converter. Great for travel, physics, sports, and navigation, this fast and easy tool helps you convert speed units instantly.
Knot (kn) — a nautical unit of speed equal to one nautical mile per hour
It is defined as a speed of one nautical mile traveled in one hour; since 1 nautical mile = 1852 meters exactly, 1 knot = 0.514444 meters per second exactly. Used worldwide in maritime navigation, aviation, meteorology, sailing, shipping, oceanography, and weather forecasting.
- Symbol: kn, kt
- System: Nautical unit for speed
- Exact relations: 1 kn = 1 nmi/h = 1852 m ÷ 3600 s = 0.514444... m/s
- Other speed equivalents: 1 kn = 1.852 km/h ≈ 1.15078 mph ≈ 1.68781 ft/s
- Typical examples: ship speed is often measured in kn; wind speeds in marine forecasts are given in kn; a cruising sailboat may travel at 5–8 kn.
Kilometer per hour (km/h) — a metric unit of speed
It is defined as a speed of one kilometer traveled in one hour. Used worldwide for road speed limits, vehicle speeds, cycling, running, weather reports, transport, travel, and everyday speed measurements.
- Symbol: km/h, kph
- System: Metric unit for speed; based on SI units
- Exact relations: 1 km/h = 1000 m ÷ 3600 s = 5/18 m/s ≈ 0.277778 m/s
- Other speed equivalents: 1 km/h ≈ 0.621371 mph ≈ 0.911344 ft/s ≈ 0.539957 kn
- Typical examples: city speed limits may be 30–50 km/h; highway speeds may be 100–120 km/h; a fast cyclist may ride at 30 km/h.