The hashrate is a measure of how many hash functions a computer can process per second. These can be denoted by using different prefixes like Megahash, Gigahash, Terahash, for a million, billion, and trillion hashes respectively. or MH/s, GH/s, and TH/s. When looking at the Bitcoin network as a whole, figures can easily climb into the Petahash or Exahash territory (quadrillion and quintillion) in the amount of computations per second.