Nautical miles and kilometers
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One nautical mile is exactly 1.852 kilometers. To convert nautical miles to kilometers, multiply by 1.852; to convert kilometers to nautical miles, divide by 1.852 or multiply by 0.539957. So 10 nautical miles is 18.52 km and 100 km is 53.996 nautical miles.
Formulas: kilometers = nautical miles × 1.852 · nautical miles = kilometers ÷ 1.852 · nautical miles = kilometers × 0.539957
Nautical Miles to Kilometers Chart
Nautical miles in kilometers and statute miles:
| Nautical miles | Kilometers | Statute miles |
|---|---|---|
| 1 | 1.852 | 1.151 |
| 2 | 3.704 | 2.302 |
| 3 | 5.556 | 3.452 |
| 4 | 7.408 | 4.603 |
| 5 | 9.26 | 5.754 |
| 6 | 11.112 | 6.905 |
| 7 | 12.964 | 8.055 |
| 8 | 14.816 | 9.206 |
| 9 | 16.668 | 10.357 |
| 10 | 18.52 | 11.508 |
| 15 | 27.78 | 17.262 |
| 20 | 37.04 | 23.016 |
| 25 | 46.3 | 28.769 |
| 30 | 55.56 | 34.523 |
| 40 | 74.08 | 46.031 |
| 50 | 92.6 | 57.539 |
| 60 | 111.12 | 69.047 |
| 75 | 138.9 | 86.308 |
| 100 | 185.2 | 115.078 |
| 150 | 277.8 | 172.617 |
| 200 | 370.4 | 230.156 |
| 250 | 463 | 287.695 |
| 500 | 926 | 575.39 |
| 1,000 | 1,852 | 1,150.779 |
Kilometers to Nautical Miles Chart
Kilometers in nautical miles:
| Kilometers | Nautical miles |
|---|---|
| 1 | 0.54 |
| 2 | 1.08 |
| 5 | 2.7 |
| 10 | 5.4 |
| 20 | 10.799 |
| 25 | 13.499 |
| 50 | 26.998 |
| 100 | 53.996 |
| 200 | 107.991 |
| 250 | 134.989 |
| 500 | 269.978 |
| 1,000 | 539.957 |
Why a Nautical Mile Is 1,852 Meters
The nautical mile is the unit of distance at sea and in the air, and it is based on one minute of latitude. According to NOAA, it was set at exactly 1.852 kilometers in 1929 by what is now the International Hydrographic Organization, and this international nautical mile is used throughout the world; there is no “nautical kilometer”. The U.S. National Institute of Standards and Technology lists the same exact factors in its guide to unit conversions: 1 nautical mile = 1,852 meters, 1 foot = 0.3048 meter and 1 mile = 1,609.344 meters.
More Distance and Speed Converters
The same nautical mile in other units: the Nautical Miles to Meters Converter and the Nautical Miles to Feet Converter. For statute miles, use the Nautical Miles to Miles Converter or, for the other direction, the Miles to Nautical Miles Converter. Speeds at sea are in knots, one nautical mile per hour, and the Knots to km/h Converter turns them into kilometers per hour. To work out time, distance or speed for a trip, use the Speed, Distance and Time Calculator. For the distance in a straight line between two latitude and longitude positions, use the Great Circle Distance Calculator.
Frequently Asked Questions
How many kilometers are in a nautical mile?
Exactly 1.852 kilometers, which is 1,852 meters.
How do you convert nautical miles to kilometers?
Multiply by 1.852. For example, 10 nautical miles is 18.52 km and 100 nautical miles is 185.2 km.
How many nautical miles are in a kilometer?
One kilometer is 0.539957 nautical mile, about 0.54 nautical mile. A distance of 100 km is 53.996 nautical miles.
Is a nautical mile longer than a kilometer?
Yes. A nautical mile is 1.852 kilometers, almost twice as long, and about 1.151 statute miles.
Why is a nautical mile 1.852 kilometers?
It is based on one minute of latitude, and in 1929 what is now the International Hydrographic Organization set the international nautical mile at exactly 1.852 kilometers, the value used throughout the world.