Convert Earth's polar radius to mile (US survey)
Please provide values below to convert Earth's polar radius [R_p] to mile (US survey) [mi (survey)], or Convert mile (US survey) to Earth's polar radius.
How to Convert Earth's Polar Radius to Mile (Us Survey)
1 R_p = 3949.894855603 mi (survey)
Example: convert 15 R_p to mi (survey):
15 R_p = 15 × 3949.894855603 mi (survey) = 59248.4228340449 mi (survey)
Earth's Polar Radius to Mile (Us Survey) Conversion Table
| Earth's polar radius | mile (US survey) |
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Earth's Polar Radius
The Earth's polar radius is the distance from the center of the Earth to the North or South Pole, approximately 6,356.8 kilometers.
History/Origin
The fact that the Earth is an oblate spheroid, flattened at the poles, has been known since the 18th century. Modern measurements are made with high precision.
Current Use
The Earth's polar radius is a key parameter in geodesy and is used to define the Earth's shape and gravitational field.
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.