Annualized electrical energy demand from Bitcoin mining rose to about 190 terawatt-hours in December 2025, up 38% from 138 in June 2024, in keeping with preliminary analysis reported by theEnergyMag.
Alexander Neumueller of the Cambridge Middle for Different Finance introduced the figures on the Power Traders Discussion board in Dallas. Cambridge expects to publish the second version of its Digital Mining Business Report later in 2026.
The analysis additionally discovered that hydropower had surpassed pure fuel as the most important vitality supply for Bitcoin mining. Low-carbon vitality provided 59.4% of the reported mining combine, up from 52.4% within the earlier research. Nevertheless, complete estimated greenhouse fuel emissions nonetheless elevated by 20%, from round 40 million to 48 million tons of carbon dioxide equal.
Hydroelectric vitality takes nearly all of mining vitality
The 2025 Cambridge Digital Mining Business Report discovered that pure fuel provided 38.2% of surveyed miners’ electrical energy, making it the most important single supply on the time. Renewable energies contributed 42.6% in complete, whereas nuclear vitality added 9.8%. Coal’s share had fallen to eight.9%, down from 36.6% within the earlier estimate for 2022.
The preliminary replace modifications that order. Hydropower is now forward of pure fuel, though Cambridge has not revealed the complete breakdown of every supply. Neumueller linked a part of the change to larger survey protection in water-rich markets like Ethiopia. Ethiopia expanded Bitcoin mining round low-cost electrical energy from the Grand Ethiopian Renaissance Dam.
Electrical energy demand rising quicker than emissions
Annualized grid vitality consumption elevated by roughly 52 TWh between the 2 benchmarks. Annualized demand measures the electrical energy that Bitcoin mining would devour over a 12 months if the December 2025 price continued. This doesn’t imply that miners consumed precisely 190 TWh throughout calendar 12 months 2025.
Emissions rose extra slowly than electrical energy demand as a result of miners reported utilizing a low-carbon vitality combine. Nonetheless, Cambridge’s estimate elevated from about 40 million to 48 million tons of CO₂ equal. The cleaner combine slowed the expansion price of emissions, however didn’t offset larger general electrical energy consumption.
Extra mining machines joined the community throughout the measured interval, growing the overall computing energy. Newer {hardware} can carry out extra calculations for every unit of electrical energy, however the features in effectivity didn’t absolutely offset the rise in hash price. The Cambridge Bitcoin Electrical energy Consumption Index tracks how costs, transaction charges, mining tools, and community problem can change estimated electrical energy demand over time.
Preliminary figures take the bounds of the survey
Cambridge based mostly the brand new estimates totally on responses from mining firms that account for simply over half of the worldwide Bitcoin hashrate. The broader protection offers researchers a bigger pattern than the primary report. Nevertheless, the ultimate publication might revise some figures after Cambridge completes additional checks.
The 2025 report additionally warned that survey participation can distort geographic estimates. American firms supplied a big share of the solutions, possible exaggerating the nation’s involvement in world mining exercise. The newest reported hydropower surge might partly mirror higher protection of miners in Ethiopia and different markets that rely extra on hydropower era.
The earlier Cambridge research estimated 39.8 million tonnes of emissions utilizing its survey-based technique. A separate location-based mannequin produced a a lot larger estimate of 69.6 million tonnes. The hole reveals that the outcomes rely on assumptions about mining places, electrical energy contracts, community mixes and the usage of deserted or burned vitality.
Miners discover AI, however implementations stay restricted
The brand new survey additionally examined whether or not Bitcoin miners are shifting energy capability to synthetic intelligence and high-performance computing. About 10% of respondents mentioned they’d already allotted some energy to AI or accelerated computing. Greater than 40% of the remaining miners mentioned they had been actively exploring the choice.
Neumueller warned that “the intention to research it isn’t a dedication to deploy it.” AI knowledge facilities want costly networking, cooling, and reliability programs that primary Bitcoin mining websites might not have. Miners can shortly cut back Bitcoin hundreds when electrical energy costs rise, whereas AI purchasers usually require fixed energy and stronger service ensures.
Nonetheless, practically 9 in ten respondents anticipated AI and HPC diversification to realize traction within the coming years. As crypto.information reported, publicly traded miners have already introduced greater than $70 billion in AI and HPC contracts as they search extra steady revenue exterior of Bitcoin manufacturing.
The change is already seen within the outcomes of some firms. TeraWulf generated extra income from HPC internet hosting than from Bitcoin mining throughout the first quarter of 2026. It reported $21 million from HPC companies, in comparison with lower than $13 million from digital asset mining.
The Cambridge findings present two modifications occurring collectively. Bitcoin mining makes use of extra electrical energy, whereas hydropower and different low-carbon sources account for a bigger proportion. On the identical time, mining firms are evaluating whether or not their vitality connections and websites can assist AI companies. The total Cambridge report will present an in depth vitality breakdown and remaining methodology later in 2026.
