Length
miles to nautical miles Converter
1 mi = 0.86898 nmi. Enter any value and the result updates instantly.
Convert
Accuracy and rounding
Use the decimal result for specifications. For tape measures, round only after you know the tolerance you need.
Miles and nautical miles are tied back to the SI meter through fixed definitions, so the underlying conversion factor is stable.
For cutting, fitting, drawings, and product specs, keep extra decimals in nautical miles and round only at the final step.
How to convert miles to nautical miles
- Type the miles value in the calculator.
- Keep miles selected as the from unit and nautical miles selected as the to unit.
- Use the instant result, or copy it with the copy button.
miles to nautical miles chart
| miles | nautical miles |
|---|---|
| 1 mi | 0.86898 nmi |
| 2 mi | 1.738 nmi |
| 5 mi | 4.3449 nmi |
| 10 mi | 8.6898 nmi |
| 25 mi | 21.7244 nmi |
| 50 mi | 43.4488 nmi |
| 100 mi | 86.8976 nmi |
Formula
nmi = mi x 0.868976241901
Example: 1 mi = 0.86898 nmi.
Source
SI meter definitions and exact international inch, foot, yard, and mile relationships.
Common questions
How do I convert miles to nautical miles?
Enter the miles value in the converter, or multiply by the factor shown in the formula. 1 mi = 0.86898 nmi.
What should I watch out for?
Round only after converting if the measurement is used for cutting, fitting, or specifications.
Where does this length conversion come from?
SI meter definitions and exact international inch, foot, yard, and mile relationships. ConverterBase uses stable definitions and fixed conversion factors, not live or rounded market data.