The Surface Area of a Sphere calculator computes the surface area of a sphere based on its radius (r).
INSTRUCTIONS: Choose units and enter the following:
Sphere Surface Area (A): The Surface Area of the Sphere is returned in square meters (m2). However, this can be automatically converted into other area units (e.g. square feet, acres) via the pull-down menu.
The formula for the surface area of a sphere is:
A = 4π•r²