Nautical Miles to Kilometers
( nmi → km )
Instantly convert nautical miles to kilometers. Enter any value below and get an accurate result with the full formula and reference table.
How to Convert Nautical Miles to Kilometers
To convert nautical miles to kilometers, multiply the number of nautical miles by 1.852. This factor comes from the definition: one nautical mile equals one minute of latitude, which corresponds to 1,852 meters exactly.
Step-by-Step Example
Let’s convert 10 nautical miles to kilometers:
1. Multiply by 1.852: 10 × 1.852 = 18.52 km
2. So 10 nautical miles equals 18.52 kilometers.
For a distance of 100 nautical miles: 100 × 1.852 = 185.2 km.
Why Exactly 1.852?
The nautical mile was historically defined as one minute of latitude along any meridian. In 1929, the international nautical mile was standardized to exactly 1,852 meters. This makes it convenient for navigation because it relates directly to degrees and minutes on a chart.
When You’d Use Each Unit
Nautical miles are used in aviation, marine navigation, and for international boundaries at sea. Kilometers are the standard unit of distance on land in most countries. Converting between them is essential for flight planning, sea travel, and understanding global distances.
Common nautical miles values converted to kilometers — popular distances highlighted.
| Nautical Miles (nmi) | Kilometers (km) | Approximate |
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