Formula:
The formula for the surface area (A) of a prolate spheroid is:
A = 2πb2 + 2πab/e × sin-1(e)
Where:
a= semi-major axis (half the longest diameter)b= semi-minor axis (half the shortest diameter)e= eccentricity =√(1 - (b/a)2)π≈ 3.14159sin-1(e)is the arcsine of the eccentricity in radians.