This is machine translation

Translated by Microsoft
Mouseover text to see original. Click the button below to return to the English version of the page.

Note: This page has been translated by MathWorks. Please click here
To view all translated materials including this page, select Japan from the country navigator on the bottom of this page.


Mean radius of planet Earth


R = earthRadius
R = earthRadius(lengthUnit)


R = earthRadius returns the scalar value 6371000, the mean radius of the Earth in meters.

R = earthRadius(lengthUnit) returns the mean radius of the Earth using the specified unit of length. The lengthUnit input may be any string accepted by the validateLengthUnit function.


earthRadius             % Returns 6371000

earthRadius('meters')   % Returns 6371000

earthRadius('km')       % Returns 6371

Introduced in R2010b

Was this topic helpful?