How do I estimate the size of the Megalodon Shark by the tooth?

What’s the best way to measure a Megalodon tooth?

Measure the diagonal length from the tooth’s tip to the longest corner of its root. If there are two possible diagonal measurements, always use the longer one as the tooth’s official size.

Can a Megalodon tooth tell you how big the shark was?

Yes, you can estimate the shark’s length, especially with a primary (usually symmetrical top) tooth. A good rule of thumb is that for every 1/8 inch of tooth length, the shark was about one foot long.

For instance, if you have a 7-inch tooth: There are eight 1/8-inch segments in one inch. So, 8 x 7 inches equals a 56-foot long shark!