Convert Miles to nautical miles
1 mile = 0.868976 nautical miles · nmi = mi ÷ 1.150779448
When you need this conversion
This conversion goes from miles, the standard road distance unit in the US and UK, to nautical miles, the navigation unit used at sea and in aviation. Both measure the same physical quantity, so the conversion is exact — the difference is which unit your source, tool, or region happens to use.
Miles to nautical miles conversion table
| Miles (mi) | Nautical miles (nmi) |
|---|---|
| 1 mi | 0.868976 nmi |
| 2 mi | 1.738 nmi |
| 3 mi | 2.6069 nmi |
| 5 mi | 4.3449 nmi |
| 10 mi | 8.6898 nmi |
| 15 mi | 13.0346 nmi |
| 20 mi | 17.3795 nmi |
| 25 mi | 21.7244 nmi |
| 50 mi | 43.4488 nmi |
| 75 mi | 65.1732 nmi |
| 100 mi | 86.8976 nmi |
| 250 mi | 217.24 nmi |
| 500 mi | 434.49 nmi |
| 1,000 mi | 868.98 nmi |
The formula
nmi = mi ÷ 1.150779448Because both units measure length, the conversion is a single multiplication by a fixed factor. That factor never changes, so the result is exact.
Convert the other way
Nautical miles to miles →Related length conversions
- Millimeters to micrometers
- Centimeters to inches
- Centimeters to feet
- Meters to kilometers
- Kilometers to meters
- Inches to centimeters
- Feet to centimeters
- Feet to yards
- Yards to feet
- Micrometers to millimeters
- Millimeters to nautical miles
- Centimeters to nautical miles
Frequently asked questions
- How many nautical miles are in a mile?
- There are 0.868976 nautical miles in 1 mile. The formula is nmi = mi ÷ 1.150779448.
- How do you convert miles to nautical miles?
- Use the formula nmi = mi ÷ 1.150779448. For example, 10 miles equals 8.6898 nautical miles.
- Is the miles to nautical miles conversion exact?
- Yes. Miles and nautical miles are both units of length, related by an exact defined factor. Displayed results are rounded for readability.
- What is mi short for?
- mi is the standard symbol for mile. nmi is the symbol for nautical mile.