"Ovoid" is not clearly defined.
In the case of an ellipsoid, the figure is clearly defined, but - just as the circumference of an ellipse - the surface area of an ellipsoid is somewhat difficult to calculate, and can't be expressed in terms of elementary functions.
The Wikipedia article on "ellipsoid" has an approximate formula that you can use.
Both the Wikipedia and Wolfram Alpha have exact formulae; but understanding them requires some advanced math.
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Kinda of a combination of both. The surface of a 3-D object is called surface area.
surface area is basically the total area of each surface of the 3d object. Sa = 2-D A = 3-D
surface area of glass plate
Surface area equals 864cm2
Volume does not, surface area does.