Bitcoin mining’s annualized electrical energy demand rose to about 190 terawatt-hours in December 2025, up 38% from 138 the in June 2024, in keeping with preliminary analysis reported by theEnergyMag.
Alexander Neumueller of the Cambridge Centre for Different Finance offered the figures on the Power Buyers 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 overtaken pure gasoline as Bitcoin mining’s largest single vitality supply. Low-carbon energy provided 59.4% of the reported mining combine, up from 52.4% within the earlier research. Nevertheless, complete estimated greenhouse-gas emissions nonetheless elevated by 20%, from about 40 million to 48 million tonnes of carbon-dioxide equal.
Hydropower takes the biggest share of mining energy
The 2025 Cambridge Digital Mining Business Report discovered that pure gasoline provided 38.2% of surveyed miners’ electrical energy, making it the biggest single supply on the time. Renewables supplied 42.6% in complete, whereas nuclear energy added 9.8%. Coal’s share had fallen to eight.9%, down from 36.6% within the earlier 2022 estimate.
The preliminary replace adjustments that order. Hydropower now ranks forward of pure gasoline, though Cambridge has not launched the complete breakdown for every supply. Neumueller linked a part of the change to stronger survey protection in hydro-rich markets corresponding to Ethiopia.Ethiopia expanded Bitcoin mining round low-cost electrical energy from the Grand Ethiopian Renaissance Dam.
Electrical energy demand rises sooner than emissions
The community’s annualized energy use elevated by about 52 TWh between the 2 reference factors. Annualized demand measures the electrical energy Bitcoin mining would use over a yr if the December 2025 charge continued. It doesn’t imply miners consumed precisely 190 TWh throughout the 2025 calendar yr.
Emissions rose extra slowly than electrical energy demand as a result of miners reported utilizing a lower-carbon energy combine. Even so, Cambridge’s estimate nonetheless elevated from roughly 40 million to 48 million tonnes of CO₂ equal. The cleaner combine slowed the speed of emissions progress, nevertheless it didn’t offset increased total electrical energy consumption.
Extra mining machines joined the community throughout the measured interval, elevating complete computing energy. Newer {hardware} can carry out extra calculations for every unit of electrical energy, however effectivity positive aspects didn’t totally counter the rise in hashrate. Cambridge’s Bitcoin Electrical energy Consumption Index tracks how costs, transaction charges, mining gear and community issue can change estimated electrical energy demand over time.
Preliminary figures carry survey limits
Cambridge based mostly the brand new estimates primarily on responses from mining firms representing barely greater than half of world 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. U.S. firms provided a big share of responses, which doubtless overstated the nation’s portion of world mining exercise. The newest rise in reported hydropower might partly mirror higher protection of miners in Ethiopia and different markets that rely extra closely on hydroelectric era.
Cambridge’s earlier research estimated 39.8 million tonnes of emissions utilizing its survey-based technique. A separate location-based mannequin produced a a lot increased estimate of 69.6 million tonnes. The hole reveals that outcomes rely on assumptions about mining areas, electrical energy contracts, grid mixes and using stranded or flared vitality.
Miners discover AI, however deployments stay restricted
The brand new survey additionally examined whether or not Bitcoin miners are shifting energy capability into synthetic intelligence and high-performance computing. About 10% of respondents mentioned that they had already allotted some energy to AI or accelerated computing. Greater than 40% of the remaining miners mentioned they have been actively exploring the choice.
Neumueller cautioned that “intent to look into it isn’t dedication to deploy.” AI information facilities want expensive networking, cooling and reliability programs that fundamental Bitcoin mining websites might not have. Miners can rapidly scale back Bitcoin hundreds when electrical energy costs rise, whereas AI prospects normally require regular energy and stronger service ensures.
Nonetheless, nearly 9 in ten respondents anticipated AI and HPC diversification to realize floor over the subsequent a number of years. As crypto.information reported, listed miners have already introduced greater than $70 billion in AI and HPC contracts as they search steadier income exterior Bitcoin manufacturing.
The change is already seen in some firm outcomes. TeraWulf generated extra income from HPC internet hosting than Bitcoin mining throughout the first quarter of 2026. It reported $21 million from HPC providers, in contrast with lower than $13 million from digital asset mining.
The Cambridge findings present two adjustments happening collectively. Bitcoin mining makes use of extra electrical energy, whereas hydropower and different low-carbon sources account for a bigger share. On the similar time, mining firms are assessing whether or not their energy connections and websites can help AI providers. Cambridge’s full report will present an in depth vitality breakdown and last methodology later in 2026.
