Convert mile (US survey) to nautical mile (international)
Please provide values below to convert mile (US survey) [mi (survey)] to nautical mile (international) [NM], or Convert nautical mile (international) to mile (US survey).
How to Convert Mile (Us Survey) to Nautical Mile (International)
1 mi (survey) = 0.868977979856587 NM
Example: convert 15 mi (survey) to NM:
15 mi (survey) = 15 × 0.868977979856587 NM = 13.0346696978488 NM
Mile (Us Survey) to Nautical Mile (International) Conversion Table
| mile (US survey) | nautical mile (international) |
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Mile (Us Survey)
The U.S. survey mile is a unit of length equal to 5,280 U.S. survey feet.
History/Origin
The U.S. survey foot was defined such that 1 meter is exactly 39.37 inches. This made the U.S. survey mile slightly longer than the international mile. The use of the survey foot was officially phased out in 2022.
Current Use
The U.S. survey mile was used for land surveying in the United States.
Nautical Mile (International)
The international nautical mile is a unit of length used in marine and air navigation, defined as exactly 1,852 meters.
History/Origin
Historically, a nautical mile was defined as one minute of arc of latitude. The international nautical mile was defined by the First International Extraordinary Hydrographic Conference in Monaco in 1929. The United States adopted it in 1954, and the United Kingdom in 1970.
Current Use
The nautical mile is used for maritime and aviation purposes worldwide.