How many bytes is the human brain?

Answer 1

One estimate of 1020 bits is actually an early estimate (by Von Neumann in The Computer and the Brain) of all the neural impulses conducted in the brain during a lifetime. This number is almost certainly larger than the true answer. Another method is to estimate the total number of synapses, and then presume that each synapse can hold a few bits. Estimates of the number of synapses have been made in the range from 1013 to 1015, with corresponding estimates of memory capacity.

Answer 2

The human brain is estimated to store information equivalent to about 2.5 petabytes, which is roughly 2.5 million gigabytes. However, it is difficult to equate brain capacity to bytes, as the brain functions differently from a digital storage system.

Answer 3

Estimated 1-6 tb