km/h to knots

Kilometer per hour measures the number of kilometers traveled in one hour. It's the most common speed unit for vehicles and everyday speed references in metric countries.

1 km/h = 1/3.6 m/s = 0.2778 m/s. There are 3600 seconds in an hour and 1000 meters in a kilometer.

To m/s: ÷ 3.6. To mph: × 0.621. To ft/s: × 0.911. To knots: × 0.540.

Speed limits (50 km/h urban, 100–130 km/h highway), vehicle speedometers, cycling speeds, marathon pace, and wind speed forecasts.

World's fastest train: 603 km/h (maglev). Commercial aircraft cruise: 850–950 km/h. Formula 1 top speed: 372 km/h. Hurricane winds: 119+ km/h.

Directly converting km to km/h without accounting for time. Also, confusing km/h with m/s in physics problems (always convert to SI).

Divide by 3.6 to convert to m/s. Quick approximation: 60 km/h ≈ 17 m/s. Remember: km/h ÷ 3.6 = m/s.

A knot is one nautical mile per hour, where a nautical mile equals exactly 1,852 meters. It's the standard speed unit in maritime and aviation contexts.

1 knot = 1 nautical mile/hour = 1,852 m/h = 1.852 km/h = 0.514 m/s. One nautical mile = 1,852 meters exactly.

To km/h: × 1.852. To mph: × 1.151. To m/s: × 0.514. To ft/s: × 1.688.

Ship cruising speeds (cruise ships: 20–25 knots), aircraft speeds (Boeing 747: 490 knots cruise), wind speed in aviation weather reports (METAR), and sailing.

Fastest ship: 60+ knots (naval vessels). Blue whale swim: 5–20 knots. Jet stream winds: 80–140 knots. Hurricane-force winds: 64+ knots.

Saying 'knots per hour' — incorrect! A knot already includes 'per hour.' Just say 'knots.' Also, confusing nautical and statute miles.

1 knot ≈ 1.85 km/h. Roughly: 10 knots ≈ 20 km/h. Remember: knots are for sea and sky, km/h and mph are for land.