Data centres require a lot of energy to run. It’s why it’s so frustrating to hear AI’s major players attempt to play a game of misdirection by making claims along the lines of a single LLM prompt requiring but a fourteenth of a cup of tea. Worse still, as big tech continues to build out its AI infrastructure, data centres’ power demands are only set to increase.
Worldwide data centre electricity consumption is expected to rise from 447 terawatt-hours in 2025, to 565 terawatt-hours in 2026. That will mark a 26% year-over-year increase, according to Gartner’s latest forecast.
Data centres’ power demand globally is expected to rise 27% this year, peaking at a predicted total of 132 gigawatts. That’s up from 2025’s 104 GW total, with analysts expecting to see power demand continue to rise—according to Gartner, data centre demand may cross the 290 GW mark by 2030.
Gartner’s Director Analyst, Linglan Wang, explains, “Surging demand for compute-intensive AI workloads is driving unprecedented data center power growth, while AI capacity is now constrained by power availability, making data center power security the new battle ground for scaling and protecting margins in the global AI race.”
Gartner estimates that AI-optimized server adoption will account for 31% of data centre power consumption this year, having grown by 84.2%. By 2027, the power demands of AI servers is expected to grow by 47.8%, surpassing that of ‘conventional servers.’ Comparatively, the power demands of the ‘conventional server’ segment grew by about 1.2% in 2026, and is on a trajectory to grow by 2.4% in 2027.
Given that recent analysis of Google’s latest environmental report suggests the company’s energy consumption is on a trend of exponential growth, an upward trend across the industry is unsurprising. It’s also perhaps worth noting that not all of Google’s energy comes from renewable sources, and that the total electricity consumption for this one company last year was 43 TWh. That’s almost 10% of Gartner’s global numbers.
Add to that a reported 80% of the world’s data centres have been built in less than optimal climates, having to compensate with a whole lot of temperature control systems, and environmentally, things start to look all the bleaker for the climate conscious. In fact, Gartner lists the power consumption of the ‘Cooling and other Infrastructure’ data centre segment as having grown by 22.6% in 2026.
Not only that, but increased demand from data centres will likely tax local power infrastructure—not to mention any of the other reasons why data centres make especially poor neighbours.
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