Take the longitude of the place for which you want to find the antipode and subtract the longitude from 180. Antipodes are always 180° of longitude away. Memphis is located at approximately 90° West longitude, so we take 180-90=90.

How do you find the opposite coordinates of the earth?

The opposite is as simple as subtracting your longitude from 180 degrees and switching cardinal directions. If you don't want to have to borrow seconds/minutes, use Decimal Degrees format for your coordinates. For example, 180 - 108.755619° W = 71.241592°.

Where is the antipode?

In the Northern Hemisphere, "the Antipodes" may refer to Australia and New Zealand, and Antipodeans to their inhabitants. Geographically, the antipodes of Britain and Ireland are in the Pacific Ocean, south of New Zealand.