Mining involves computers repeatedly performing cryptographic calculations, called hashes, to try to find a valid solution for the next block. Hash rate measures how many of these calculations the entire network can perform per second, combining the effort of every miner participating at once. A higher hash rate means more total computing power is being spent competing to add the next block to the chain.
Hash rate is typically expressed in hashes per second, though for major networks the practical figures are usually described using much larger compound units to keep the numbers manageable. Individual miners often combine their computing power with others in a mining pool, sharing out block rewards proportionally to the work each contributes, which is part of why network-wide hash rate reflects the combined activity of many participants rather than any single miner acting alone.
This matters for security because a higher network-wide hash rate generally makes a blockchain more resistant to certain attacks. An attacker would need to control a very large share of the total computing power to overwhelm honest participants, a scenario often discussed in relation to the '51% attack' concept, where controlling a majority of hash rate could in theory let an attacker disrupt normal network operation. It's worth keeping in mind that hash rate is a network-level aggregate figure that fluctuates with miner participation, electricity costs, and hardware availability, and on its own it says nothing about a coin's price.
Key takeaways
- Hash rate measures the combined computing power dedicated to mining on a proof-of-work blockchain.
- A higher network hash rate generally makes the chain more costly to attack, since more computing power would be needed to overwhelm it.
- Hash rate is a separate metric from price and can rise or fall independently of a coin's market value.
Hash Rate — frequently asked questions
Does a higher hash rate mean a higher price?
Not directly. Hash rate reflects mining activity and network security, while price reflects market supply and demand. The two can move independently of each other.
Why does hash rate matter for security?
Proof-of-work security depends on honest participants controlling most of the network's computing power. A higher total hash rate raises the cost and difficulty of an attacker trying to gain enough power to disrupt the chain.
New to crypto, or filling in the gaps? Work through the essentials in Learn, browse every term A–Z, or see live prices for the coins these concepts power.