# General Information, Facts & Tables [Sphere Calculator]

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Overview

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A sphere is a round solid with each point on the surface being equidistant from the centre.

Formula

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 Required Known r d c A V r - r = d / 2 r = c / pi / 2 r = (( A / pi )1/2) / 2 r = (( V * 3 )/ ( 4 * pi ))1/3 d d = r * 2 - d = c / pi d = ( A / pi )1/2 d = (( V * 6 )/ pi )1/3 c c = 2 * pi * r c = pi * d - c = ( A / pi )1/2 * p c = (( V * 6/ pi )1/3) * pi A A = 4 * pi * r2 A = pi * d2 A = pi * (c / pi )2 - A = (( V * 6/ pi )1/3)2 * pi V V = 4 / 3 * pi * r3 V = pi * d3 / 6 V = pi * ( c / pi )3 / 6 V = ((( A / pi )1/2 )3 ) / 6 * pi -

Units

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d = Diameter (metre [m])
c = Circumference (metre [m])
A = Surface area (square metre [m2])
V = Volume (cubic metre [m3] or kilolitre [kL])

Calculator

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 Show all available units r []: d []: c []: A []: V []:

Note! Set unit values prior to calculating.

Notes

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A number to the power (1/2) or (0.5) is the square root of the number.
A number to the power (1/3) or (0.33333...) is the cube root of the number.