21 miles = 18.25 nautical miles
21 miles is equal to 18.25 nautical miles when rounded to two decimal places.
More precise conversion
21 miles = 18.2485010799 nautical miles
How to convert 21 miles to nautical miles
Use the exact ratio between 1,609.344 meters and 1,852 meters.
21 × 1609.344 ÷ 1852 = 18.2485010799 nautical miles
The primary result is rounded to two decimal places. The more precise result is rounded to 10 decimal places.
Also equals
- Kilometers
- 33.796224 km
- Meters
- 33796.224 m
- Yards
- 36960 yd
- Feet
- 110880 ft
Miles to nautical miles converter
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About miles and nautical miles
One international mile is exactly 1,609.344 meters, while one international nautical mile is exactly 1,852 meters. A nautical mile is longer and is commonly used in marine and aviation navigation.