In keeping with a preliminary examine reported by theEnergyMag, annual electrical energy demand for Bitcoin mining will improve to roughly 190 terawatt-hours in December 2025, a 38% improve from 138 terawatt-hours in June 2024.
Alexander Neumuller of the Cambridge Middle for Different Finance introduced the numbers on the Power Investor Discussion board in Dallas. Cambridge plans to publish the second version of its Digital Mining Business Report in late 2026.
The examine additionally discovered that hydropower has overtaken pure fuel as the most important single power supply for Bitcoin mining. Low-carbon electrical energy provides 59.4% of the reported mining combine, up from 52.4% within the earlier survey. Nevertheless, complete estimated greenhouse fuel emissions nonetheless elevated by 20%, from about 40 million to 48 million tonnes of carbon dioxide equal.
Hydropower accounts for the most important share of mine electrical energy
The 2025 Cambridge Digital Mining Report discovered that pure fuel supplied 38.2% of the electrical energy for surveyed miners, making it the most important single supply of electrical energy on the time. Renewables supplied a complete of 42.6%, with nuclear energy including 9.8%. The share of coal fell to eight.9%, down from the preliminary estimate of 36.6% in 2022.
A preliminary replace modifications that order. Cambridge has not launched an entire breakdown of every useful resource, however hydropower now exceeds pure fuel. Neumuller linked among the modifications to elevated analysis protection in hydro-rich markets equivalent to Ethiopia. Ethiopia has expanded its Bitcoin mining operations with the assistance of low-cost electrical energy from the Grand Ethiopian Renaissance Dam.
Electrical energy demand will increase quicker than emissions
The community’s annual electrical energy utilization elevated by roughly 52 TWh between the 2 reference factors. Annualized demand measures how a lot electrical energy Bitcoin mining would use in a single yr if December 2025 charges continued. This doesn’t imply that the miner consumed precisely 190 TWh throughout the 2025 calendar yr.
Emissions grew extra slowly than electrical energy demand, as miners reported utilizing decrease carbon electrical energy mixes. Nonetheless, Cambridge estimates it has elevated from about 40 million tonnes of CO₂ equal to 48 million tonnes. Though the cleaner combine slowed the speed of development in emissions, it was unable to offset the rise in total electrical energy consumption.
Extra mining machines joined the community throughout the measurement interval, rising the full computing energy. New {hardware} can carry out extra computations per unit of energy, however the effectivity features have not absolutely countered the rise in hashrate. The Cambridge Bitcoin Energy Consumption Index tracks how costs, transaction charges, mining gear, and community issue change estimated energy demand over time.
Preliminary figures embrace survey limits
Cambridge based mostly its new estimates totally on responses from mining corporations, which account for simply over half of the worldwide Bitcoin hashrate. The broader scope permits researchers to acquire a bigger pattern than the unique report. Nevertheless, some figures could also be revised within the closing publication after Cambridge completes additional checks.
The 2025 report additionally warned that participation in surveys might skew geographic estimates. US corporations accounted for almost all of responses, doubtlessly overstating the US’ share of world mining exercise. The latest improve in reported hydropower technology might partially replicate the elevated protection of miners in Ethiopia and different markets that rely closely on hydropower technology.
A earlier examine from the College of Cambridge used a survey-based method to estimate emissions at 39.8 million tonnes. One other location-based mannequin yielded a a lot larger estimate of 69.6 million tonnes. This hole signifies that outcomes are depending on assumptions relating to mining location, energy contracts, grid configuration, and use of stranded or flared power.
Miners are exploring AI, however adoption stays restricted
The brand new examine additionally investigated whether or not Bitcoin miners are shifting energy capability towards synthetic intelligence and high-performance computing. Roughly 10% of respondents stated they’ve already allotted some degree of authority to AI or accelerated computing. Greater than 40% of the remaining miners stated they have been actively contemplating this selection.
Neumuller cautioned that “the intention to research doesn’t assure implementation.” AI information facilities require costly networking, cooling, and dependable programs that primary Bitcoin mining websites might not have. If electrical energy costs rise, miners can rapidly cut back the Bitcoin load, however AI clients sometimes require steady energy and stronger service ensures.
Nonetheless, almost 9 in 10 respondents anticipate AI and HPC to turn into extra numerous within the coming years. As reported by crypto.information, publicly traded miners have already introduced greater than $70 billion in AI and HPC contracts in the hunt for extra steady income outdoors of Bitcoin manufacturing.
This alteration is already being mirrored within the efficiency of some corporations. TeraWulf generated extra income from HPC internet hosting than Bitcoin mining within the first quarter of 2026. HPC providers reported $21 million, whereas digital asset mining accounted for lower than $13 million.
The Cambridge findings present that two modifications are occurring concurrently. Bitcoin mining makes use of extra electrical energy, however hydropower and different low-carbon sources account for a bigger share. On the similar time, mining corporations are evaluating whether or not their energy connections and websites can help AI providers. Cambridge’s full report is anticipated to supply an in depth power breakdown and closing methodology in late 2026.
