Miles to nautical miles
Type a value in miles to see it in nautical miles 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 miles box.
- Read the result in nautical miles as you type, and pick the precision you need.
- Swap the direction to convert back, or copy the result.
How it is calculated
nmi = mi × 0.8689762419
Multiply the value in miles by 0.8689762419 to get nautical miles.
Example
To convert 25 mi to nautical miles: 25 × 0.8689762419 = 21.7244 nmi.
Conversion table
| Miles (mi) | Nautical miles (nmi) |
|---|---|
| 1 | 0.868976 |
| 2 | 1.73795 |
| 3 | 2.60693 |
| 5 | 4.34488 |
| 10 | 8.68976 |
| 20 | 17.3795 |
| 25 | 21.7244 |
| 50 | 43.4488 |
| 100 | 86.8976 |
| 250 | 217.244 |
| 500 | 434.488 |
| 1,000 | 868.976 |
About the units
- Mile
- The international statute mile is 1760 yards, exactly 1609.344 meters, used on roads in the US and UK.
- Nautical mile
- The international nautical mile is exactly 1852 meters, used in sea and air navigation.
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 nautical miles are in one mile?
1 mi = 0.868976 nmi exactly.
How do I convert miles to nautical miles?
Use nmi = mi × 0.8689762419. For example, 25 mi = 21.7244 nmi.
How many miles are in one nautical mile?
1 nmi = 1.15078 mi.
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.