General · EdgepediaSeptember 17, 20267 min read

Electric energy consumption

Electric energy consumption is the use of electrical energy by end users, measured as the product of power and time and billed in kilowatthours (kWh); one kWh is 1,000 watts of power expended for one hour, equivalent to 3,412 Btu¹. It is distinct from electricity generation, which is larger because some energy is lost or consumed in the power system itself before reaching customers. Global consumption is growing faster than total energy demand, driven by electrification of transport and heating, air conditioning, industrial production, and data centers².

Key fact	Detail
Unit	Kilowatthour (kWh): 1,000 watts sustained for one hour; 1 kWh = 3,412 Btu¹
Global growth 2024	Demand rose 4.3%, up from 2.5% in 2023; consumption increased by 1,080 TWh, nearly twice the annual average of the past decade³
China's share	More than one-third of global electricity consumption since 2023; gross demand approached 10,000 TWh at the end of 2024⁴
Sector growth 2024	Buildings added more than 600 TWh (5%), nearly 60% of total growth; industry nearly 40%; transport electricity rose over 8% on EV uptake⁵^•³
Outlook 2025-2027	Consumption forecast to rise an unprecedented 3,500 TWh, close to 4% annually; emerging economies supply 85% of the growth⁶
United States	About 4.20 trillion kWh consumed in 2025, the highest recorded and 14 times the 1950 level⁷
Electrification share	Electricity's share of final energy consumption in 2024: China 28%, United States 22%, European Union 21%⁶

Units and measurement

Electricity is measured in watts, a unit of power named after James Watt. Larger quantities use kilowatts (1,000 W), megawatts (1,000 kW), and gigawatts (1,000 MW). Consumption over time is measured in watthours: one Wh is the energy of one watt used for one hour. Utilities and power plants generally measure electricity in kilowatthours; a 40-watt light bulb run for five hours uses 200 Wh, or 0.2 kWh⁸.

Utility companies measure customer consumption with meters, usually located where the power line connects to the building. Mechanical meters read manually have given way to automated meters and, today, electronic smart meters that wirelessly send usage data in real time; some advanced meters can track the use of individual devices and allow remote control⁸. In 2022, US electric utilities had about 119 million advanced metering infrastructure (AMI) installations, about 72% of all electric meters, with residential customers accounting for roughly 88% of installations⁹.

What consumption statistics count. The US Energy Information Administration defines end-use energy consumption as consumption of primary energy plus electricity sales to ultimate customers by the residential, commercial, industrial, and transportation sectors, excluding electrical system energy losses¹⁰. Total US electricity end-use consumption includes retail sales plus direct use, meaning electricity consumed by the same industrial or commercial facility that produced it; direct use was about 3.3% of US end-use consumption in 2025⁷.

Where electricity is consumed

Consumption is conventionally divided into four end-use sectors: residential, commercial, industrial, and transportation¹⁰. In homes, electricity can power well over 100 end uses; the three largest categories of residential site electricity consumption in the United States in 2020 were air conditioning (19%), space heating (12%), and water heating (12%), with lighting and refrigerators the next largest¹¹. The average US household consumes about 10,500 kWh per year, with wide variation by region and housing type; apartments in the Northeast use the least and single-family detached homes in the South the most, partly because Southern homes more often have electric heating and air conditioning¹¹.

Industry is the most electricity-intensive sector in some economies. In China, industry consumes approximately 60% of all electricity, against an OECD average of 32%⁴. Electric motors account for a large part of industrial electricity consumption, and upgrading motor systems, including variable-speed drives, is a key efficiency measure¹².

Transport is the fastest-changing sector: the continued uptake of electric vehicles raised electricity consumption in transport by over 8% in 2024³.

Global trends

Global electricity demand grew 4.3% in 2024, a step change from 2.5% in 2023; the average pace from 2010 to 2023 was 2.7%, double the rate of total energy demand growth over the same period³. Electricity use is rising faster than overall energy demand due to higher demand for cooling, rising industrial consumption, electrification of transport, and the growth of data centers and artificial intelligence².

China dominates the growth. China accounted for 54% of global demand growth in 2024, with consumption rising about 7% in both 2023 and 2024 despite economic growth of around 5%⁴. Since 2020, Chinese power demand has grown faster than the economy, boosted by electricity-intensive manufacturing of clean energy technologies, rising air conditioner ownership, electric vehicles, and expanding data centers and 5G networks⁴. Manufacturing of solar modules, batteries, and electric vehicles consumed more than 300 TWh in 2024, roughly as much as Italy uses in a year⁴.

Buildings and advanced economies. Global electricity consumption in buildings rose by more than 600 TWh (5%) in 2024, nearly 60% of total growth⁵. In advanced economies, total and per-capita electricity demand stayed flat or declined from 2009 as efficiency gains in lighting and appliances and the relocation of heavy industries offset economic growth; that trend is now reversing, with consumption expected to rise through 2027 on electric vehicles, air conditioners, data centers, and heat pumps⁶. In the United States, demand rebounded 2% in 2024 to a new high after a 1.8% decline in 2023, and is forecast to grow about 2% annually through 2027, equivalent to adding California's total electricity demand over three years⁶.

Outlook. The IEA forecasts global consumption rising by 3,500 TWh over 2025-2027, close to 4% per year, adding more than the equivalent of Japan's annual consumption each year; emerging and developing economies, led by China, account for about 85% of the additional demand⁶.

Losses between generation and consumption

Not all generated electricity reaches consumers. In Brazil's regulatory framework, losses are the energy that passes through transmission and distribution networks but is never commercialized. Technical losses arise from converting electrical energy to heat in conductors (the Joule effect), transformer core losses, and dielectric losses; non-technical or commercial losses stem mainly from theft (clandestine connections), meter fraud, and billing or measurement errors¹³. The Brazilian regulator ANEEL sets regulatory percentages for technical and non-technical losses in periodic tariff reviews every four or five years, benchmarking each utility against efficient loss levels for its network characteristics; regulatory limits on non-technical losses cap what utilities can pass on to consumers' bills¹³.

Efficiency and demand management

Energy efficiency improvements in IEA member countries since 2000 saved approximately 24% of energy use by 2021, as much as India's final energy consumption; industry and services accounted for 58% of these savings, buildings 23%, and transport 19%¹⁴. Long-running appliance efficiency policies, such as minimum energy performance standards and energy labels, have helped halve the average consumption of many common appliances, including refrigerators, air conditioners, lighting, and washing machines¹⁴.

Consumption also has a time dimension that total energy does not capture. Demand follows predictable daily patterns, with a morning ramp and an evening peak; peak demand is often a time of high price and system stress, requiring more costly peaking generation units¹⁵. Demand response programs pay customers to temporarily reduce demand at certain times, and demand-side management more broadly covers utility actions that reduce or shift end-use consumption, from curtailing industrial processes to promoting efficient equipment¹⁶. Smart meters underpin these programs by providing hourly or real-time consumption data to both utilities and customers⁹.

References

Topic: Encyclopedia › Technology and the built world › Energy technology › Efficiency, conservation, and transition

Initially written Sep 17, 2026 · Reviewed: Sep 30, 2026; Oct 15, 2026 · Edited: Sep 30, 2026; Oct 15, 2026 · Last review: Oct 15, 2026

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