Bitcoin Energy Consumption Statistics 2026: TWh, GW and Energy Mix

The Cambridge Centre for Alternative Finance estimates Bitcoin’s annual electricity consumption at 138 TWh, or about 0.5% of global consumption. Digiconomist’s Bitcoin Energy Consumption Index puts the same network at 204.44 TWh. That reading was captured on 5 September 2026 from a live-updating index. Both figures describe the same blockchain, and the gap between them comes from methodology and the different periods each reading covers.

Cambridge builds its estimate from a survey whose reported data represents 48% of global mining activity. Cambridge applies a 7-day moving average to reduce the effect of short-term hashrate volatility, and its model begins on July 18th 2010. The figures below cover consumption, the fuel mix, emissions, cost per megawatt-hour, hardware efficiency and the grid effects that regulators now measure.

Key Takeaways

• Sustainable sources supplied 52.4% of Bitcoin mining electricity, up from a 2022 estimate of 37.6%, according to Cambridge Centre for Alternative Finance research.
• Natural gas at 38.2% has replaced coal, now 8.9%, as the single largest energy source used in Bitcoin mining, according to Cambridge Digital Mining Industry Report data.
• Cambridge and Digiconomist differ by 66.44 TWh a year on the same network, at 138 TWh versus 204.44 TWh.
• Industry-wide ASIC hardware efficiency reached 28.2 J/TH as of June 2024, a 24% YoY improvement.
• Electricity constitutes more than 80% of miner cash-based operational expenses, at a median electricity cost of $45/MWh, according to Cambridge Centre for Alternative Finance survey data.
• Data center and cryptocurrency demand could increase 2030 US power sector CO2 emissions by up to 28% relative to a future with no data center growth, under energy system optimisation modelling of the US power sector.

Editor’s Choice

• Annual electricity consumption: 138 TWh estimated by the Cambridge Centre for Alternative Finance.
• Competing index reading: 204.44 TWh, per Digiconomist’s Bitcoin Energy Consumption Index on 5 September 2026.
• Network-wide emissions: 39.8 MtCO2e, about 0.08% of global annual greenhouse gas emissions, per Cambridge Digital Mining Industry Report data.
• US electricity share: probably 0.6% to 2.3% of US consumption, per preliminary EIA estimates.
• US share of reported mining: 75.4% of total reported Bitcoin mining activity, ahead of Canada at 7.1%, per Cambridge Centre for Alternative Finance survey data.
• ERCOT interconnection queue: 41 gigawatts (GW) of requests for new cryptocurrency mining capacity, according to North American Electric Reliability Corporation data.

How Much Electricity Bitcoin Mining Uses

• Cambridge Centre for Alternative Finance research estimates Bitcoin’s annual electricity consumption at 138 TWh, or about 0.5% of global consumption.
• That total represents a year-over-year increase of 17% and approximately 0.54% of global electricity consumption.
• Digiconomist’s index reports 204.44 TWh of annualised electrical energy for the Bitcoin network.
• Cambridge Bitcoin Electricity Consumption Index data put average annual daily power demand for the global Bitcoin network at 12.3 gigawatts (GW) in 2022.
• That 2022 figure is more than 1% of US electricity generating capacity, or approximately 0.1% of global electricity generating capacity.
• Digiconomist also estimates a single Bitcoin transaction footprint of 832.15 kWh of electrical energy.
• Ethereum represents 0.005% of the power demand of Bitcoin, according to data from the Cambridge Centre for Alternative Finance, largely because of its different consensus mechanism. The contrast with our Ethereum energy consumption data is the clearest illustration of how much the consensus mechanism, not the user base, drives the number.

Source: Cambridge Centre for Alternative Finance 2025, Digiconomist 2026, US Energy Information Administration 2024

About This Data

Compiled from 19 cited findings across 7 primary sources. Those are two Cambridge publications, two US federal documents, one journal article, and two live indices captured on 5 September 2026. Publication dates run from February 2024 to April 2026, and figures update when those sources publish new editions.

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How much electricity does Bitcoin consume?

Bitcoin’s annual electricity consumption is estimated at 138 TWh by the Cambridge Centre for Alternative Finance, roughly 0.5% of global consumption. Digiconomist’s competing index reports 204.44 TWh for the same network.

Bitcoin Mining Energy Mix by Source

• Sustainable energy sources accounted for 52.4% of Bitcoin mining electricity, compared with a 2022 estimate of 37.6% overall sustainable energy use.
• Natural gas, at 38.2% and up from 25.0% in 2022, has replaced coal as the single largest energy source used in Bitcoin mining.
• Coal fell to 8.9%, down from 36.6% in 2022.
• Hydropower is the largest sustainable source at 23.4%, followed by wind at 15.4%.
• Nuclear supplies 9.8% and solar 3.2%, with other renewables at 0.5%.
• Fossil fuels make up 47.6% of the mix in total, with oil at 0.5%.

By the numbers: The Cambridge Centre for Alternative Finance puts sustainable sources at 52.4% of Bitcoin mining electricity, which includes 9.8% nuclear and 42.6% renewables such as hydropower and wind, against a 2022 estimate of 37.6% for overall sustainable energy use. Natural gas displaced coal across that period; renewables did not displace fossil fuel outright.

Recent Developments

• 2026: The Congressional Research Service published its assessment of cryptocurrency mining and the electricity sector, reviewing federal estimates and pending legislation.
• 2025: The Cambridge Centre for Alternative Finance issued its Digital Mining Industry Report on 28 April, based on a survey of 49 digital mining firms.
• 2026: Energy system modelling published on iopscience.iop.org covered data center and cryptocurrency demand across 26 interconnected US power regions through 2030.
• 2024: The US Energy Information Administration discontinued the emergency collection of data for Form EIA-862, the Cryptocurrency Mining Operations Survey.
• September 2026: Digiconomist’s live index read 204.44 TWh of annualised electrical energy and 114.03 Mt CO2 when captured for this update.
• 2024: Core Scientific agreed to deliver approximately 500 MW of digital infrastructure to host CoreWeave’s AI and high-performance computing workloads.

Why Bitcoin Energy Estimates Disagree

• The Cambridge estimate of 138 TWh rests on reported data representing 48% of global mining activity.
• That survey covered 49 digital mining firms, of which 41% are publicly listed, with headquarters in 16 jurisdictions and operations spanning 23 countries.
• Digiconomist’s model reported 204.44 TWh on the same network.
• The two indices also diverge on waste, with Digiconomist reporting 20.87 kt of electronic waste.
• The same survey put actual e-waste at approximately 2.3 kilotonnes, because 86.9% of decommissioned hardware is expected to be repurposed or recycled.
• Cambridge applies a 7-day moving average to reduce the effect of short-term hashrate volatility before publishing a figure.

Source: Cambridge Centre for Alternative Finance 2025, Digiconomist index captured 5 September 2026

This report directly addresses a persistent data gap by relying on direct practitioner insights rather than abstractions. The statement comes from Alexander Neumueller, Research Lead, Digital Assets Energy and Climate Impact at the CCAF, and lead author of the report.

Bitcoin Mining Electricity Use in the United States

• Annual electricity use from cryptocurrency mining probably represents from 0.6% to 2.3% of US electricity consumption, according to preliminary U.S. Energy Information Administration estimates.
• EIA’s top-down approach assumed the US share of global activity remained at approximately 38%, producing a domestic range of 25 terawatt-hours (TWh) to 91 TWh.
• The bottom-up approach identified 137 mining facilities as of 2023.
• EIA identified maximum electricity use for 101 of those facilities, totalling an estimated power demand of 10.275 GW in 2023.
• Applying an 80% utilisation rate to that capacity gives an estimate of 70 TWh per year.
• A separate analysis relying on Cambridge data produced 2024 estimates ranging from approximately 25 TWh to 100 TWh.
• The identified sites sit in 21 states, with most in Texas, Georgia, and New York.

That range is wide for administrative reasons. The federal survey designed to close it was discontinued, so the US numbers stay a modelled band.

Bitcoin Mining Carbon Emissions

• Network-wide emissions associated with Bitcoin mining are estimated at 39.8 MtCO2e.
• That total represents about 0.08% of global annual greenhouse gas emissions.
• A more nuanced analysis in the same report suggests a potential range of 32.9 to 37.6 MtCO2e.
• Digiconomist’s index reports a carbon footprint of 114.03 Mt CO2.
• The same index puts a single Bitcoin transaction at 464.14 kgCO2.
• Cambridge reported that 70.8% of survey respondents are actively undertaking climate mitigation measures.

What Miners Pay for Electricity

• Miners report a median electricity cost of $45/MWh.
• Electricity constitutes more than 80% of miners’ cash-based operational expenses.
• Miners express at least great concerns about long-term energy price increases, cited by 57% of respondents.
• The legacy miner revenue model, heavily reliant on the block subsidy, faces increasing pressure from recurring halving events.

Siting, curtailment, and off-grid interest all follow the price per megawatt-hour, not an environmental commitment.

What Mining Demand Does to US Electricity Prices

• Data center and cryptocurrency demand could increase 2030 US power sector CO2 emissions by up to 28% relative to a future with no data center growth.
• Electricity costs, measured as demand-weighted locational marginal prices, rise by up to 57% in some regions under that modelling.
• The national average increase ranges from 6% to 29% across the modelled scenarios.
• The model covers 26 interconnected power regions, with coal-fired generation rebounding in Northern Virginia while Texas accommodates growth primarily through natural gas.
• The Electric Reliability Council of Texas has 41 gigawatts (GW) of requests for new cryptocurrency mining capacity, for which 9 GW of planning studies have been approved, according to the North American Electric Reliability Corporation.
• In 2022, New York passed a two-year moratorium that blocked issuance of permits and approval of applications for new cryptocurrency mines while the state evaluated their environmental effects.

Why it matters: The energy system model puts the national average electricity cost increase at 6% to 29% across the modelled scenarios, with demand-weighted locational marginal prices rising by up to 57% in some regions, and 2030 power sector CO2 emissions up to 28% higher than a future with no data center growth.

Bitcoin Mining Hardware Efficiency and E-Waste

• Industry-wide ASIC (SHA-256) hardware efficiency is estimated at 28.2 J/TH as of June 2024, marking a 24% year-over-year improvement, which the report says closely aligns with top-down projections from its CBECI model.
• By the end of 2024, 11.1% of the then-current hashrate, equal to 61.8 EH/s, was projected to be phased out.
• Cambridge expects 86.9% of that decommissioned hardware to be repurposed or recycled.
• Actual e-waste is approximated at about 2.3 kilotonnes on that basis.
• Digiconomist’s index reports 20.87 kt of electronic waste and 84.96 grams per transaction.

Cambridge nets resale and recycling out of its total; the Digiconomist index publishes a far larger one. The same boundary question runs through the wider cloud computing infrastructure data.

Where Bitcoin Mining Happens

• Miners in the US account for 75.4% of total reported Bitcoin mining activity.
• Canada follows at 7.1% of reported activity.
• The underlying survey drew on firms with headquarters in 16 different jurisdictions and operations spanning 23 countries.

Source: Cambridge Digital Mining Industry Report, April 2025

That share reports survey activity from a US-weighted respondent base, not a census of the world’s machines.

Curtailment, Demand Response and Off-Grid Power

• Miners reported a total load curtailment of 888 GWh for the calendar year 2023.
• 26% of surveyed digital mining firms reported using off-grid energy sources, while the remaining 74% did not.
• Off-grid energy accounts for only 8.1% of total power consumption, or 1.23 GW.
• Cambridge reported that 70.8% of respondents are actively undertaking climate mitigation measures.

Source: Cambridge Digital Mining Industry Report, April 2025

What Miners Say Their Energy Risks Are

• Long-term energy price increases draw at least great concern from 57% of surveyed miners.
• Unfavourable governmental action at the local or federal level concerns 47% of respondents.
• Adverse bitcoin price developments concern 40% of respondents.
• Core Scientific agreed to deliver approximately 500 MW of digital infrastructure to host CoreWeave’s AI and high-performance computing workloads, powered by NVIDIA GPUs.

Readers want a single-company yardstick, and our Google and Facebook datasets get pulled into it. We do not run that comparison: a network-wide estimate and a corporate reporting boundary are not the same measurement.

Can Bitcoin survive without electricity?

No. Bitcoin uses a proof-of-work approach. Miners add blocks of transactions to a blockchain by solving cryptographic puzzles. Those puzzles require significant computational power. That computational power is measured as a hash rate, the number of attempts to solve the puzzle per second, performed by specialised hardware capable of many trillions of calculations a second.

Proof-of-stake networks stake tokens as collateral instead of expending computational effort. Ethereum represents 0.005% of the power demand of Bitcoin as a result. The energy is the security budget, not a side effect. Cutting it means changing the consensus rule, and the Bitcoin and Ethereum network comparison turns on that choice.

What happens when all 21 million bitcoins are mined?

The legacy miner revenue model, heavily reliant on the block subsidy, faces increasing pressure from recurring halving events. Diversification into high-growth sectors such as high-performance computing serving AI workloads, leveraging existing infrastructure, is emerging as a key adaptive strategy.

Every halving rehearses the end of the subsidy, cutting the reward that pays the power bill. The answer is visible in hosting deals, not in lower draw. Wider network context sits in our Bitcoin dataset.

Conclusion

Bitcoin’s annual electricity consumption sits at an estimated 138 TWh, about 0.5% of global consumption, on the Cambridge Centre for Alternative Finance methodology. Digiconomist’s index reads 204.44 TWh for the same network. Quoting one figure without the other quotes a methodology, not a measurement. The same caution applies to e-waste and emissions.

The argument has moved. Grid operators, state legislatures, and energy system modelling now price this load in dollars per megawatt-hour, not only in tonnes of carbon. Miners, with over 80% of cash costs in electricity, watch the same variable.