Convert Earth polar radius to pole Online | Free Length Converter

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Earth Polar Radius


The Earth's polar radius is the distance from the center of the Earth to the North or South Pole. It measures the Earth’s radius along its rotational axis.



  • Its value is approximately 6,356.8 kilometers (about 3,949.9 miles).



  • The Earth is an oblate spheroid, so the polar radius is slightly shorter than the equatorial radius due to the planet's flattening at the poles.



  • This measurement is crucial for geodesy, understanding Earth’s shape, and satellite navigation.



Key facts:



  • Polar radius ≈ 6,356.8 km



  • Smaller than equatorial radius by about 21.3 km



  • Important for precise Earth modeling and mapping



The difference between the polar and equatorial radius reflects the Earth’s rotation and its effect on the planet’s shape.



Pole


A pole is another traditional unit of length equivalent to a rod or perch. It measures exactly 16.5 feet, 5.5 yards, or about 5.0292 meters.


The pole has been used historically in land measurement and surveying, especially in England and the United States. Like the rod and perch, it helped standardize measurements of fields, plots, and boundaries before the adoption of metric units.


Key conversions:



  • 1 pole = 16.5 feet



  • 1 pole = 5.5 yards



  • 1 pole ≈ 5.0292 meters



  • 4 poles = 1 chain



  • 40 poles = 1 furlong



Though largely replaced by modern units, the pole remains a notable term in historical surveying and land records.



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