Bitcoin Mining Profitability Calculator

Bitcoin mining profitability rests on a probabilistic race. Every hash a machine computes has an independent chance of landing below the network target, and that chance equals one divided by difficulty times 2^32. Multiplying hash rate by 86,400 seconds and by the 3.125 BTC subsidy, then dividing by difficulty times 2^32, gives the expected daily coin production of a machine competing against the whole network. The expectation is accurate over long horizons but extremely noisy over short ones, which is why a solo miner with a few hundred TH/s can go years without finding a block and why almost all hash rate is pooled. Costs are dominated by electricity: power in kilowatts times 24 hours times the tariff per kWh. Efficiency, expressed in joules per terahash, is the number that decides survival. Machines shipped in 2024 and 2025 sit near 13 to 20 J/TH, while older S19-class units run 30 to 45 J/TH. Industrial operators generally need power in the range of 0.03 to 0.06 dollars per kWh to survive a bear market, whereas a residential tariff of 0.12 or more usually leaves no margin at all. Two caveats matter. Difficulty retargets every 2,016 blocks and has trended upward for most of Bitcoin history, so any snapshot decays quickly. And this model omits pool fees of roughly 1 to 2 percent, transaction fee revenue, hardware depreciation, cooling overhead, and downtime.

Mining began with the genesis block on 3 January 2009, when the reference client hashed on ordinary CPUs, the subsidy was 50 BTC, and difficulty stayed at 1 for more than a year. GPU mining arrived during 2010 through open-source OpenCL miners, field-programmable gate arrays followed in 2011, and the first commercial ASICs shipped in early 2013 from Canaan Avalon and Butterfly Labs, ending the era of general-purpose hardware. Pooled mining was introduced in late 2010 by Marek Palatinus, known as Slush, precisely to smooth the payout variance that made solo mining impractical, and the share-accounting scheme he devised still underpins modern pool payouts. The difficulty retarget and the halving are both written into the protocol. Difficulty recalculates every 2,016 blocks to hold the average block interval near 10 minutes, and the subsidy halves every 210,000 blocks: 50 to 25 in 2012, to 12.5 in 2016, to 6.25 in 2020, and to 3.125 in April 2024. Because each halving instantly removes half of gross revenue while electricity bills stay fixed, break-even modelling became a standard part of operating a mine rather than a hobbyist curiosity. The 2021 relocation of hash rate out of China after Beijing banned mining, and the growth of listed miners in North America, turned these calculations into routine corporate disclosures.