If you’re seriously into mining—or even just thinking about getting into this space—sooner or later you’ll come across this abbreviation: GH/s. I’ve noticed that many beginners get confused by these metrics, even though, in reality, everything is quite logical once you dig into it.

Gigahashes per second is simply a way to measure how many computations your miner can perform in one second. More specifically: one billion hash operations. It sounds complicated, but the point is simple: the higher this number, the better your chances of finding a valid block and earning a reward. Miners solve cryptographic problems using algorithms like SHA-256 for Bitcoin, and each attempt is one hash. GH/s shows how quickly your hardware can churn through these attempts.

The development history is interesting: people used to mine with ordinary CPUs, then moved to graphics cards, and now specialized chips—ASICs—dominate. It’s like evolution: from bicycles to sports cars. Each leap meant exponential growth in power.

Now, about the scale. There’s a whole hierarchy of units, and it’s easy to get lost here. It starts with H/s—one operation per second, very basic. Then comes KH/s—kilohashes, a thousand operations—then MH/s, which is a million hashes per second, effectively the level where early graphics cards worked when mining altcoins. Above that is our GH/s—one billion operations, a typical figure for mid-range ASIC equipment; for example, some Kaspa miners operate at around 17 GH/s. Next is TH/s—terahashes, a trillion—which is already the standard for modern Bitcoin rigs. Even higher are PH/s, and finally EH/s—exahashes, quintillion operations per second. It’s at the EH/s level that the entire Bitcoin network operates as a whole.

What does this mean for your earnings? It’s straightforward: your GH/s determines your share of network rewards. If the network grows, the difficulty automatically increases, and that can eat into your profits. In mining pools, your hashrate is pooled with others, and the reward is distributed proportionally, minus a small fee. The main enemy of profitability is electricity. Top ASICs consume 3500–5500 watts, and if your electricity tariff is high, even a powerful rig won’t pay off. Efficiency is measured in joules per terahash—the lower, the better. The best modern chips reach 15–25 J/TH.

When choosing equipment, you need to consider not only GH/s but also efficiency. For a beginner, a good option is an ASIC at 17 GH/s for Kaspa or similar altcoins—it doesn’t require huge power consumption and can pay back quickly. If you want to mine Bitcoin, then at minimum you should look at the TH/s level, where competition is tougher. Corporate operations already run at 400+ TH/s and use immersion cooling.

The main advice: use profitability calculators, enter your real figures—GH/s or TH/s, electricity tariff—and see what you get. Difficulty increases quickly, and what was profitable a month ago can become unprofitable today. Keep tracking this metric constantly, and you’ll know whether it’s worth investing in new equipment or not.