The Radius of a Sphere from the Surface Area calculator computes the radius (r) based on the surface area of a sphere (SA).
INSTRUCTIONS: Choose units and enter the following:
Sphere Radius (r): The radius is returned in meters. However, this can be automatically converted to other length units (e.g. feet) via the pull-down menu.
The equation for the surface area of a sphere is as follows:
If we solve for the radius (r), we have the formula for the radius of a sphere based on the surface area which is:
`r = sqrt( (SA) / (4π) )`