Nautical Miles to KM Converter
Convert nautical miles to kilometers and back instantly. 1 nautical mile = 1.852 km. Used in aviation and maritime navigation worldwide. Free, accurate, with formula and conversion table.
1 NM × 1.852 = 1.852 km
Common Conversions
| Nautical Miles | Kilometers | Miles |
|---|---|---|
| 1 NM | 1.852 km | 1.151 mi |
| 5 NM | 9.260 km | 5.754 mi |
| 10 NM | 18.520 km | 11.508 mi |
| 25 NM | 46.300 km | 28.769 mi |
| 50 NM | 92.600 km | 57.539 mi |
| 100 NM | 185.200 km | 115.078 mi |
| 200 NM | 370.400 km | 230.156 mi |
| 500 NM | 926.000 km | 575.390 mi |
| 1000 NM | 1852.000 km | 1150.780 mi |
Understanding Nautical Miles
What is a Nautical Mile?
A nautical mile is a unit of distance used in maritime and air navigation. It is defined as one minute of arc of latitude along any meridian. The internationally agreed standard is exactly 1.852 kilometers (or approximately 1.15078 statute miles).
Why 1.852 km?
The Earth's circumference is approximately 40,075 km. Divided by 360 degrees × 60 minutes = 21,600 nautical miles. So 40,075 ÷ 21,600 ≈ 1.852 km per nautical mile. This was standardized internationally in 1929.
Nautical Miles in Aviation
All aviation distances are measured in nautical miles. Air traffic control, flight plans, and cockpit instruments all use NM. This is because nautical miles directly correspond to latitude, making navigation calculations straightforward.
Nautical Miles in Shipping
Maritime navigation uses nautical miles and nautical charts. Ship speeds are measured in knots (1 knot = 1 nautical mile per hour). International maritime law also references distances in nautical miles.
Frequently Asked Questions
How many km in 1 nautical mile?▼
Exactly 1.852 kilometers. This is the internationally standardized value.
How to convert km to nautical miles?▼
Divide the number of kilometers by 1.852. For example: 100 km ÷ 1.852 = 53.996 nautical miles.
What is the difference between a nautical mile and a mile?▼
1 nautical mile = 1.852 km, while 1 statute mile = 1.609 km. A nautical mile is about 15% longer than a regular mile.
What is a knot?▼
A knot is a unit of speed equal to 1 nautical mile per hour (1.852 km/h). It is used in aviation and maritime navigation.
How many nautical miles in a degree of latitude?▼
60 nautical miles equal 1 degree of latitude. This is why nautical miles are so useful in navigation.
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