Miles to Nautical Miles
A mile is 1,609.344 meters, the statute mile used on US and UK road signs and speed limits. A nautical mile is 1,852 meters, defined as one minute of latitude and used in marine and air navigation. 1 mi equals ≈0.868976 nmi, so converting between them is a matter of multiplying by that fixed factor — type any value into the converter below and both sides update instantly as you type.
Both units belong to length, measured here against length's base unit (m) — every other length unit on this site converts through that same reference point, which is why the table below can also be read as a quick cross-check against nearby values.
Formula
nmi = mi × ≈0.868976
mi = nmi × ≈1.15078
Worked example: 5 mi × ≈0.868976 = ≈4.34488 nmi.
Conversion table
| Mile (mi) | Nautical Mile (nmi) |
|---|---|
| 1 mi | ≈0.868976 nmi |
| 2 mi | ≈1.73795 nmi |
| 3 mi | ≈2.60693 nmi |
| 5 mi | ≈4.34488 nmi |
| 10 mi | ≈8.68976 nmi |
| 20 mi | ≈17.3795 nmi |
| 25 mi | ≈21.7244 nmi |
| 50 mi | ≈43.4488 nmi |
| 100 mi | ≈86.8976 nmi |
| 250 mi | ≈217.244 nmi |
| 500 mi | ≈434.488 nmi |
| 1,000 mi | ≈868.976 nmi |
Frequently asked
- How many Nautical Miles in a mile?
- 1 mi equals ≈0.868976 nmi.
- How do I convert Miles to Nautical Miles?
- Multiply the value in mi by ≈0.868976 to get nmi. The converter above does this instantly as you type.
- Is the conversion exact?
- Yes — Mile and Nautical Mile are both defined by a fixed conversion factor to length's base unit (m), so the result shown is exact to the precision displayed, not an approximation.