Industry is the single largest consumer of electricity in the world, responsible for roughly half of all electricity used outside of wealthy, developed nations. Globally, total electricity consumption reached about 22,848 TWh in 2019, and the industrial sector claims the biggest slice of that pie. But the picture shifts depending on where you look, and some of the fastest-growing electricity consumers aren’t factories at all.
The Global Sector Breakdown
Electricity consumption splits into a few broad categories: industry, residential (homes), commercial and public services (offices, hospitals, shops), and smaller slices like transport and agriculture. Outside of OECD countries (the wealthier, more developed economies), industry dominates, accounting for about half of all electricity consumed. That includes manufacturing, mining, chemical processing, and construction.
In OECD countries, the picture is more balanced. Since the 1970s, residential and commercial electricity use has grown steadily while industry’s share has declined. By 2019, those three sectors each consumed roughly equal shares in developed economies. Transport, agriculture, and fishing remain relatively small electricity consumers by comparison, though electric vehicles are starting to change the transport picture.
What Makes Industry So Power-Hungry
The reason industry leads globally comes down to one thing: electric motors. Motors and the systems they drive (pumps, compressors, fans, conveyors) account for 72% of all electricity used in the industrial sector. That single category of equipment is the largest electricity end-use on the planet. Motors also dominate in agriculture (87% of the sector’s electricity) and transportation (86%), though those sectors are much smaller overall.
Certain industries are especially electricity-intensive. Aluminum smelting, steel production, and chemical manufacturing require enormous amounts of power per ton of product. A single aluminum smelter can consume as much electricity as a small city. These heavy industries concentrate in countries with cheap electricity, which is one reason industry’s share is so large in developing economies.
Heating and Cooling: The Biggest Home Energy Drain
Within homes, the answer is clear: keeping comfortable uses the most electricity. Heating and cooling systems together account for 40% to 50% of a typical home’s electricity consumption. If you heat with electricity, that alone can represent more than 30% of your bill. Add air conditioning in warmer months and you’re easily at half your total usage.
Water heating is the second-largest residential electricity consumer at 10% to 15% of home energy use. Everything else, from your refrigerator to your TV to your washing machine, splits the remaining 35% to 50%. The specifics vary by climate, home size, and insulation quality, but the hierarchy stays remarkably consistent: temperature control first, hot water second, everything else third.
Lighting Still Takes a Massive Share
Lighting accounts for roughly 15% of global electricity consumption. That’s a staggering number for something many people think of as a minor expense. It also represents one of the biggest opportunities for savings. If every inefficient light source worldwide were replaced with LED alternatives, the global share of electricity used for lighting would drop by half, cutting total world electricity demand by about 5%. That reduction alone would be larger than the entire electricity consumption of many countries.
Commercial Buildings and Office Energy
In commercial buildings like offices, retail stores, and hospitals, space heating is the single largest energy end-use, consuming about 32% of total energy in U.S. commercial buildings. Ventilation and lighting each account for roughly 10%. The rest goes to refrigeration (critical for grocery stores and restaurants), office equipment, and computing infrastructure. Commercial buildings use electricity for virtually every function, making them one of the sectors where efficiency improvements have the most room to run.
Data Centers: The Fastest-Growing Consumer
The most dramatic shift in global electricity demand is happening in data centers. In 2022, data centers worldwide consumed an estimated 460 TWh of electricity. The International Energy Agency projects that figure could exceed 1,000 TWh by 2026, more than doubling in just four years. The drivers are artificial intelligence workloads, cloud computing expansion, and cryptocurrency mining.
To put 460 TWh in perspective, that’s already more electricity than many mid-sized countries use in an entire year. At 1,000 TWh, data centers alone would consume roughly 4% of projected global electricity demand. AI training and inference are particularly power-intensive: a single query to a large AI model uses several times more electricity than a standard search engine query, and the volume of those queries is growing exponentially.
Cryptocurrency Mining Rivals Entire Countries
Cryptocurrency mining has become a notable electricity consumer in its own right. Global electricity use for Bitcoin mining alone ranged from 67 TWh to 240 TWh in 2023, with a best estimate of about 120 TWh. At the high end, that’s comparable to the total electricity consumption of Australia. At the low end, it matches Greece.
The United States hosts about 38% of global Bitcoin mining activity, consuming an estimated 25 to 91 TWh domestically. The low end of that range equals the annual electricity use of entire states like Utah or West Virginia, and would power more than three million homes. The high end would supply over six million homes. U.S. cryptocurrency mining represents somewhere between 0.6% and 2.3% of total national electricity demand.
Where Demand Is Growing Fastest
The overall trend is clear: electricity demand is shifting. In developed countries, efficiency gains in industry and lighting have slowed growth in traditional sectors. But electrification of heating systems, the rise of electric vehicles, and the explosion of digital infrastructure are creating new sources of demand that more than offset those savings. In developing countries, industrialization and rising living standards continue to push industrial electricity consumption higher, while growing access to air conditioning in hotter climates is rapidly expanding residential demand.
The combination of AI, data centers, and cryptocurrency could reshape the global electricity landscape within a few years. These technologies barely registered on consumption charts a decade ago. By 2026, they may collectively consume more electricity than Japan.