Convert Miles to Nautical Miles

Convert Miles (mi) to Nautical Miles (nmi) instantly and accurately.

Miles (mi)
Nautical Miles (nmi)

Conversion Formula

nmi = mi × 0.8689762419

About Miles

A mile (mi) is 5,280 feet or approximately 1.609 kilometers, originating from the Roman 'mille passus' (thousand paces). It remains the primary distance unit in the United States and United Kingdom for road travel, with speed limits and distances posted in miles per hour (mph) and miles respectively. For perspective, a 15-20 minute drive in the city typically covers 2-4 miles, while a marathon is about 26.2 miles. The mile is also used in aviation (nautical miles) and running events.

About Nautical Miles

A nautical mile (nmi) is equal to 1,852 meters or approximately 1.15078 statute miles, based on one minute of arc along Earth's meridian. This unit is the standard for maritime and aviation navigation worldwide because it directly relates to Earth's geometry, making navigation calculations simpler. Ships and aircraft measure speed in knots (nautical miles per hour). The distance between parallels of latitude is almost exactly 60 nautical miles. International maritime law uses nautical miles to define territorial waters and exclusive economic zones.

Quick Reference Table

Miles (mi)Nautical Miles (nmi)
1 mi0.868976 nmi
2 mi1.73795 nmi
5 mi4.34488 nmi
10 mi8.68976 nmi
25 mi21.7244 nmi
50 mi43.4488 nmi
100 mi86.8976 nmi

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