Knots to km/h Converter
Convert between knots (kn) and kilometers per hour (km/h) instantly. This calculator supports bidirectional conversion with high precision, perfect for maritime navigation, aviation, meteorology, and wind speed analysis.
What Is a Knot?
A knot (abbreviated as kn or kt) is a unit of speed equal to one nautical mile per hour. It is used worldwide in maritime navigation, aviation, and meteorology for measuring wind speed and vessel/aircraft speed.
Unlike statute miles (used on land), a nautical mile is based on the Earth's circumference , one minute of latitude , and is equal to 1,852 meters (approximately 1.151 statute miles).
1 knot = 1.852 km/h
1 km/h = 0.539957 knots
The Conversion Formula
To convert from knots to km/h, multiply the speed in knots by 1.852:
km/h = knots × 1.852
knots = km/h ÷ 1.852
The conversion factor comes from the definition of the nautical mile: 1 nautical mile = 1,852 meters = 1.852 kilometers. Since 1 knot = 1 nautical mile per hour, 1 knot = 1.852 km/h. This is an exact conversion factor.
Common Speed References
- 1 knot ≈ 1.15 mph ≈ 1.852 km/h
- 10 knots ≈ 11.5 mph ≈ 18.52 km/h
- 20 knots ≈ 23 mph ≈ 37.04 km/h
- 30 knots ≈ 34.5 mph ≈ 55.56 km/h
- 50 knots ≈ 57.5 mph ≈ 92.6 km/h
- Typical cruising speed: 25-30 knots (46-56 km/h)
- Hurricane threshold: 64 knots (118.5 km/h)
- Average wind speed: 5-15 knots (9-28 km/h)
Applications of Knots
- Maritime Navigation: Ship and boat speeds are measured in knots.
- Aviation: Aircraft airspeeds are often measured in knots.
- Meteorology: Wind speeds in weather forecasts are frequently given in knots.
- Oceanography: Current speeds are measured in knots.
Why Use This Knots to km/h Converter?
- Bidirectional: Convert both ways , knots to km/h and km/h to knots.
- Exact Conversion: Uses the exact factor of 1.852 for precision.
- Visual Chart: See the linear relationship between knots and km/h.
- Reference Table: Quick lookup for common conversion values.
- Free & Private: No registration, no data storage.
❓ Knots to km/h Converter FAQ
What is the formula to convert knots to km/h?
To convert knots to kilometers per hour, multiply the knot value by 1.852. For example, 10 knots × 1.852 = 18.52 km/h. This is an exact conversion factor.
What is a knot?
A knot is a unit of speed equal to one nautical mile per hour. It is used in maritime navigation, aviation, and meteorology. One knot = 1.852 km/h exactly.
How many km/h is 1 knot?
1 knot is exactly 1.852 kilometers per hour.
How many knots is 1 km/h?
1 km/h is approximately 0.539957 knots (1 ÷ 1.852).
What is the difference between a knot and a mile per hour?
A knot is based on the nautical mile (1,852 meters), while a mile per hour (mph) is based on the statute mile (1,609.344 meters). Therefore, 1 knot ≈ 1.151 mph.
What is the difference between a knot and a kilometer per hour?
A knot is based on the nautical mile (1.852 km), while a kilometer per hour is based on the kilometer (1,000 meters). One knot is exactly 1.852 km/h.
Why are knots used in aviation and maritime?
Knots are used because they are based on the nautical mile, which is directly related to the Earth's latitude and longitude. This makes navigation calculations simpler when using charts and maps.
Is this calculator free?
Yes, this calculator is completely free to use. No registration or personal data storage is required. All calculations are performed in your browser.