Hashrate is divided into a unit every thousand bits, the smallest unit is 1 hash/s, which means 1 hash operation per second.
1 Khash/s=1000 Hash/s;
1 Mhash/s=1000 Khash/s;
1 Ghash/s=1000 Mhash/s;
1 Thash/s=1000 Ghash/s;
1 Ehash/s=1000 Phash/s.
Hash/s can also be abbreviated as H/s.
In addition, due to different algorithms in mining, the way that people call the hashrate unit is also different. For example, ZEC and other coins using Equihash algorithms, the smallest unit of hashrate is Sol/s; GRIN and other coins using Cuckaroo algorithms, the smallest unit of hashrate is Graph/s. However, both are equivalent to H/s.