# volume of ellipsoid

## Primary tabs

Synonym:
ellipsoid volume
Type of Math Object:
Result
Major Section:
Reference
Groups audience:

## Mathematics Subject Classification

### Ellipsoid Volume

Why do some people (particularly from the medical field) use the following equation to calculate ellipsoid volume?

volume = length Ã— width Ã— thickness Ã— Ï€/6

### Re: Ellipsoid Volume

Volume = Length X width X thickness X pi/6
rather than using Length X width X thickness X 4/3 X pi

### Re: Ellipsoid Volume

> Volume = Length X width X thickness X pi/6
> rather than using Length X width X thickness X 4/3 X pi

That's easy. The second formula would be valid if you were using the half-length, half-width and half-thickness (like the radius of the sphere). If you use the full lengths (like the diameter) then you must divide the answer by 2x2x2=8, so 4/3 becomes 1/6.

### Re: Ellipsoid Volume

Hi ansonkoehler,
See the last Property in http://planetmath.org/encyclopedia/Similar2.html
Regards,
Jussi