New mining location added: Finland
More information
New mining location added: Finland
More information
Market Insights
Mitchell Weijerman
May 24, 2026
Bitcoin mining has its own language. Hash rate, difficulty adjustment, nonce, ASIC, mempool, block reward. If you have ever read a mining article and felt lost, this glossary is for you. Fifty terms, explained in plain English, organized by category.
A decentralized digital currency that operates on a peer-to-peer network without banks or intermediaries. Created in 2009 by the pseudonymous Satoshi Nakamoto. There will only ever be 21 million Bitcoin. Learn more in how does Bitcoin work.
The public ledger that records every Bitcoin transaction ever made. It is a chain of blocks, where each block contains a batch of transactions and is cryptographically linked to the previous block. The blockchain is maintained by thousands of computers worldwide and is practically impossible to alter.
A batch of verified transactions that is added to the blockchain approximately every 10 minutes. Each block contains a header (with metadata) and a body (with transaction data). The current maximum block weight is 4 MB.
The smallest unit of Bitcoin. One Bitcoin equals 100 million satoshis (0.00000001 BTC = 1 satoshi). Named after Bitcoin’s creator, Satoshi Nakamoto.
A computer that runs Bitcoin software and maintains a complete copy of the blockchain. Nodes verify transactions and blocks independently. There are approximately 15,000-20,000 reachable nodes on the Bitcoin network.
Software or hardware that stores your private keys and allows you to send and receive Bitcoin. Wallets do not actually “hold” Bitcoin; they hold the keys that prove ownership. See our guide on hot vs cold storage wallets.
A secret 256-bit number that gives you control over the Bitcoin associated with it. Anyone who knows your private key can spend your Bitcoin. Never share your private key with anyone.
A string of characters derived from your private key that serves as your Bitcoin “address.” You share this with others to receive Bitcoin. It is mathematically impossible to derive the private key from the public key.
Short for “memory pool.” The waiting area where unconfirmed transactions sit before being included in a block by a miner. Each node maintains its own mempool. When the mempool is full, transactions with lower fees may be delayed.
A small amount of Bitcoin paid by the sender to incentivize miners to include their transaction in a block. Higher fees result in faster confirmation. Fees vary based on network congestion.
Application-Specific Integrated Circuit. A computer chip (and the machine containing it) designed exclusively for Bitcoin mining. ASICs are thousands of times more efficient than general-purpose CPUs or GPUs at performing SHA-256 hashing. Read our full explainer on what is an ASIC miner.
The speed at which a mining machine performs SHA-256 calculations, measured in hashes per second (H/s). A modern ASIC like the Antminer S21 produces 200 terahashes per second (200 TH/s), meaning 200 trillion guesses per second.
One trillion hashes per second. The standard unit for measuring individual ASIC miner performance. Current-generation miners produce 200-234 TH/s.
One quintillion hashes per second (1,000,000 TH/s). Used to measure the total Bitcoin network hash rate. The network exceeds 660 EH/s in 2026.
The standard measure of mining efficiency. It tells you how much energy a miner consumes per unit of hash rate. Lower is better. Current-generation ASICs achieve 15-17.5 J/TH, compared to 98 J/TH for the 2017-era Antminer S9.
Running a miner at higher speeds than its default setting by increasing the clock frequency of the ASIC chips. This increases hash rate but also increases power consumption and heat. Often paired with immersion cooling.
Running a miner at lower speeds than its default. This reduces hash rate but also reduces power consumption and heat. Miners sometimes underclock during periods of low Bitcoin prices or high electricity costs to improve efficiency.
A circuit board inside an ASIC miner that contains the mining chips. Most ASIC miners have three hashboards. If one fails, the miner loses approximately one-third of its hash rate and needs repair.
The software that runs on the ASIC miner. Stock firmware comes from the manufacturer. Custom firmware (like Braiins OS) can improve efficiency, enable overclocking/underclocking, or add features like automatic power adjustments.
The component that converts wall power (AC) into the direct current (DC) that the ASIC miner needs. Most modern ASIC miners have an integrated PSU. Older models required a separate external PSU.
Secure Hash Algorithm 256-bit. The cryptographic function that Bitcoin mining is based on. It takes any input and produces a fixed 256-bit (64-character hexadecimal) output. Bitcoin mining involves finding an input that produces a SHA-256 output below a specific target. See the full process in how does Bitcoin mining work.
“Number used once.” A variable in the block header that miners increment with each hash attempt. The miner changes the nonce, hashes the block header, and checks if the result meets the difficulty target. If not, the nonce is changed and the process repeats.
A measure of how hard it is to find a valid block hash. Higher difficulty means the target hash must start with more zeros. Difficulty adjusts every 2,016 blocks (approximately two weeks) to maintain a 10-minute average block time. See difficulty explained.
The automatic recalibration of mining difficulty every 2,016 blocks. If blocks were found faster than every 10 minutes, difficulty increases. If slower, it decreases. This mechanism keeps Bitcoin’s issuance schedule predictable.
The amount of newly created Bitcoin awarded to the miner who finds a valid block. Currently 3.125 BTC per block (since April 2024). This is the primary revenue source for miners.
The special first transaction in every block that pays the block reward to the winning miner. Not to be confused with the company Coinbase. This transaction creates new Bitcoin out of nothing (it has no input).
The sequential number of a block in the blockchain. The genesis block is block 0. As of 2026, the blockchain has surpassed block 900,000.
Each block added after the block containing your transaction counts as one confirmation. One confirmation means the transaction is in the most recent block. Six confirmations (approximately 60 minutes) is the standard threshold for considering a transaction irreversible.
A valid block that is not part of the longest chain, usually because another block at the same height was accepted first. The miner who produced an orphan block does not receive the reward. Also called a stale block.
The consensus mechanism used by Bitcoin. Miners prove they have expended computational work (energy) by producing a valid block hash. This proof is what gives the blockchain its security and immutability.
A group of miners who combine their hash rate and share block rewards proportionally. Pools increase payout frequency from years (solo) to daily. See what is a mining pool and solo vs pool mining.
The percentage of rewards that the mining pool operator keeps for running the pool infrastructure. Typically 0-2.5% of your mining revenue.
A pool payout method where miners are paid a fixed amount for each valid share submitted, including estimated transaction fees. FPPS provides the most predictable income and is the most common payout method for large pools.
A unit of work submitted by a miner to the pool. Shares prove that the miner is actively hashing and are used to calculate proportional payouts. A share is a hash that meets a lower difficulty target than the actual network difficulty.
A service where you own an ASIC miner and a professional facility operates it for you, providing electricity, cooling, maintenance, and monitoring. You receive all the Bitcoin your miner produces. See hosted mining explained.
Another term for hosted mining. Your miner is “colocated” in a professional data center or mining facility. The terms are often used interchangeably.
The percentage of time a miner is actively running and hashing. Professional facilities target 99%+ uptime. Home miners typically achieve 90-95%. Every percentage point of downtime directly reduces annual revenue.
A cooling method where ASIC miners are submerged in a non-conductive liquid that absorbs heat. Immersion cooling allows higher overclocking, reduces noise, and extends hardware lifespan. More common in large-scale operations.
The standard cooling method where ASIC miners use built-in fans to push air over the hashboards. Simpler and cheaper than immersion but noisier and less effective at managing heat in hot climates.
A large-scale facility containing hundreds or thousands of ASIC miners. Mining farms are typically located in areas with cheap electricity and favorable climates. They operate 24/7 with professional staff and infrastructure.
An event that cuts the block reward in half approximately every four years (every 210,000 blocks). There have been four halvings: 2012, 2016, 2020, and 2024. The current reward is 3.125 BTC. The next halving (around 2028) will reduce it to 1.5625 BTC. See Bitcoin market cycles.
The Bitcoin price at which your mining revenue exactly equals your operating costs. If Bitcoin trades above your break-even price, mining is profitable. If below, you are losing money. For most hosted miners at 6 to 7 cents per kWh, the break-even price is approximately $30,000-40,000.
The total cost (electricity, hosting, hardware depreciation) to produce one Bitcoin. If your cost per coin is $40,000 and Bitcoin trades at $100,000, you are acquiring Bitcoin at a 60% discount to market. See buying vs producing Bitcoin.
The percentage return on your total mining investment over a given period. Calculated as (total Bitcoin revenue minus total costs) divided by initial hardware investment. Typical ROI for well-run mining operations is 100-200%+ over the life of the hardware.
The time it takes for your mining profits to recover the initial hardware purchase cost. At current conditions, a well-placed ASIC miner typically pays for itself in 12-18 months.
The daily revenue earned per terahash of mining power, expressed as $/TH/day. This metric normalizes mining revenue across different hardware, making it easy to compare profitability over time. When hash price is high, mining is very profitable.
The total combined hash rate of every miner on the Bitcoin network. Measured in exahashes per second (EH/s). Higher network hash rate means greater security but also more competition for block rewards.
A theoretical attack where an entity controlling more than 50% of the network hash rate could double-spend Bitcoin or censor transactions. At current network size, a 51% attack would cost over $25 billion and would be self-defeating because it would crash the value of Bitcoin. See how mining secures the network.
Slang for “hold” (originating from a misspelling in a 2013 Bitcoin forum post). Refers to the strategy of holding Bitcoin long-term rather than selling. Many miners are HODLers who accumulate their mined Bitcoin and only sell what is needed to cover operating costs.
The strategy of investing a fixed dollar amount at regular intervals, regardless of price. Mining is essentially automated DCA: your miner produces a fixed amount of hash rate daily, acquiring Bitcoin at your production cost every day regardless of market price.
Bookmark this page. This glossary covers every term you will encounter as a Bitcoin miner. When you hit an unfamiliar word in any of our articles, come back here for a quick explanation. We update this glossary as new terminology enters the mining industry.
Joules per terahash (J/TH). This efficiency metric determines whether a miner is profitable at your electricity rate. A lower J/TH means less electricity per unit of hash rate, which directly translates to higher profit margins. When comparing miners, J/TH matters more than raw hash rate.
Hash rate is the speed at which miners perform calculations. Difficulty is how hard the puzzle is. When total network hash rate increases, difficulty increases to keep blocks arriving every 10 minutes. They are related but distinct: hash rate is a measure of computing power, difficulty is a measure of how much computing power is needed.
Block time is the average time between blocks being added to the blockchain. Bitcoin targets a 10-minute block time. The difficulty adjustment mechanism ensures this average is maintained regardless of how much hash rate is on the network. Individual blocks can be faster or slower, but the average over 2,016 blocks is always close to 10 minutes.
Last updated: 2026-05-09
Previous
How Does Bitcoin Mining Actually Work? (Step-by-Step Process)
Join 100,000+ subscribers getting actionable tips, ROI breakdowns, and expert strategies delivered straight to their inbox.
No spam. Just high-value insights from real Bitcoin miners.
Cheap power, cold climate, fully managed. The trifecta most miners dream about.
Over 850+ investors are already using this exact system.
How One Client Earns $2,000/Day With Plug-and-Play Bitcoin Mining No tech skills. No hype. Just a smart setup.
