Nautical miles to kilometers
Type a value in nautical miles to see it in kilometers straight away, or type in the second box to convert back.
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Processing and privacy: The result is calculated inside your browser and your data is not sent to any server.
How to use it
- Type the value in the nautical miles box.
- Read the result in kilometers as you type, and pick the precision you need.
- Swap the direction to convert back, or copy the result.
How it is calculated
km = nmi × 1.852
Multiply the value in nautical miles by 1.852 to get kilometers.
Example
To convert 25 nmi to kilometers: 25 × 1.852 = 46.3 km.
Conversion table
| Nautical miles (nmi) | Kilometers (km) |
|---|---|
| 1 | 1.852 |
| 2 | 3.704 |
| 3 | 5.556 |
| 5 | 9.26 |
| 10 | 18.52 |
| 20 | 37.04 |
| 25 | 46.3 |
| 50 | 92.6 |
| 100 | 185.2 |
| 250 | 463 |
| 500 | 926 |
| 1,000 | 1,852 |
About the units
- Nautical mile
- The international nautical mile is exactly 1852 meters, used in sea and air navigation.
- Kilometer
- A kilometer is exactly 1000 meters and is the usual unit for road and travel distances.
Limits and caveats
- Results are rounded for display and computed with the browser's floating point precision (about 15 significant digits).
- Both unit factors are exact by their official definitions.
Questions about this tool
How many kilometers are in one nautical mile?
1 nmi = 1.852 km exactly.
How do I convert nautical miles to kilometers?
Use km = nmi × 1.852. For example, 25 nmi = 46.3 km.
How many nautical miles are in one kilometer?
1 km = 0.539957 nmi.
Are the inch, foot and mile factors exact or rounded?
They are exact by definition. Since the 1959 agreement one inch is exactly 2.54 cm, one foot 0.3048 m and one mile 1609.344 m.
What is the difference between a mile and a nautical mile?
A statute mile is 1609.344 meters and is used on roads. A nautical mile is 1852 meters and is used at sea and in aviation.