Miles to nautical miles – convert mi to nmi
Convert miles to nautical miles (mi to nmi) to express everyday land distances in the units used for sea and air navigation. Ideal when planning sailing routes or flights starting from road-map distances.
Open the interactive mi → nmi converter:
Use main converter (mi → nmi) or switch to nmi → miThe length converter on the homepage also handles kilometres, metres, yards and feet for mixed-unit planning.
Quick reference: miles to nautical miles
One mile is about 0.868976 nautical miles, so: nmi = miles × 0.868976. Some examples:
| Miles (mi) | Nautical miles (nmi, approx.) |
|---|---|
| 10 mi | 8.69 nmi |
| 25 mi | 21.72 nmi |
| 50 mi | 43.45 nmi |
| 75 mi | 65.17 nmi |
| 100 mi | 86.90 nmi |
| 150 mi | 130.34 nmi |
| 200 mi | 173.79 nmi |
Why convert miles to nautical miles?
Reasons to go from mi to nmi:
- Comparing car or train journeys with sea passages or flight legs.
- Planning coastal cruising based on distances seen on road signs.
- Understanding logbook entries and charts that use nautical miles.
- Teaching how everyday miles relate to navigation units.
Other length converters on this site
The converter keeps the exact relationships between miles, nautical miles and kilometres, so you can safely chain conversions for route planning.
Page last updated: 4 December 2025.