Convert caliber to mile (US survey) Online | Free Length Converter

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Caliber


Caliber is a term used to describe the internal diameter of a cylindrical object, most commonly the inside diameter of a gun barrel or firearm bore. It is typically measured in inches or millimeters.



  • In firearms, caliber indicates the diameter of the bullet or projectile that can be fired from the barrel (e.g., a .45 caliber means the barrel’s internal diameter is 0.45 inches).



  • In other contexts, such as engineering or piping, caliber can refer more generally to the diameter or thickness of tubes or cylindrical objects.



Key points:



  • Caliber = internal diameter of a barrel or tube



  • Measured in inches or millimeters



  • Important for firearm specifications and ammunition compatibility



  • Also used in engineering and manufacturing



Caliber is crucial for matching ammunition to firearms and for defining performance characteristics like velocity and accuracy.



Mile (US Survey)


The US survey mile is a unit of length used in land surveying in the United States. It is defined as exactly 5,280 survey feet, with one survey foot equal to 1200/3937 meters (approximately 0.3048006096 meters). This makes the US survey mile equal to about 1,609.3472 meters, slightly longer than the international (statute) mile, which is exactly 1,609.344 meters.


The US survey mile was established to maintain consistency with older land measurement systems based on the Mendenhall Order of 1893. It was commonly used in mapping, legal land descriptions, and public land surveys.


Although the difference between the survey and statute mile is very small (about 3.2 millimeters), it can be significant over large distances. As of 2023, the U.S. has officially retired the survey foot (and survey mile) for most applications, favoring the international foot and mile to standardize measurements.



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