What Share of US Electricity Do Data Centers Use? – Today and Forecasts
You have probably seen the headlines: data centers are eating the grid, or data centers are a rounding error, depending on who is writing. Both camps usually cite real numbers. They just pick different years, different regions and different forecasts. If you work in power, real estate or policy, you need a cleaner picture of data centers' share of US electricity than that. What share of US electricity do data centers actually use, and how much could that grow?
US data centers used about 176 terawatt-hours (TWh) of electricity in 2023, roughly 4.4 percent of the nation's total, according to Lawrence Berkeley National Laboratory's 2024 report for the Department of Energy. The same report projects 325 to 580 TWh by 2028, or about 6.7 to 12 percent of US electricity. The wide range reflects real uncertainty about chip shipments, efficiency and how many announced projects get built, and in some states the share is already far higher than the national figure.
What Share of US Electricity Do Data Centers Use Today?
The best recent public estimate is 4.4 percent for 2023. It comes from Lawrence Berkeley National Laboratory (LBNL), which has tracked data center energy use for the federal government for years. The Department of Energy's announcement of the report in December 2024 summarized the headline figures: 176 TWh in 2023, up from 58 TWh in 2014.
To get a feel for the scale, run the math backward. If 176 TWh is 4.4 percent, total US electricity use is about 176 ÷ 0.044 = 4,000 TWh. Data centers, in other words, used roughly one of every 23 kilowatt-hours the country consumed.
That number spans the major facility types: hyperscale cloud campuses, colocation buildings and enterprise server rooms. It is an estimate built from server shipments, equipment power models and facility efficiency assumptions, not a meter reading at every building. That is normal for this kind of research, but it is worth remembering when someone quotes the figure to the decimal.
How Much Is 176 TWh in Everyday Terms?
It is roughly the yearly electricity use of 16 to 18 million American homes. The math: EIA averages put a typical US household at around 10,000 to 11,000 kilowatt-hours (kWh) a year, and 176 billion kWh divided by 10,500 kWh is about 16.8 million homes.
Another way to see it is as steady power. Spread evenly across the 8,760 hours in a year, 176 TWh works out to an average draw of about 20 gigawatts (GW), around the clock. That is in the neighborhood of twenty large nuclear reactors running flat out all year, just to keep the country's servers, storage, networks and cooling running.
Those comparisons are rough, and homes and data centers use power very differently. A house peaks on summer evenings and idles at night. A data center runs close to the same load at midnight as at noon, which is exactly why utilities treat these loads as a different kind of customer.
How Fast Has Data Center Electricity Use Grown?
It roughly tripled in under a decade. The chart below uses LBNL's numbers for 2014 and 2023, plus the low and high ends of its 2028 range.
Terawatt-hours per year; 2028 shown as low and high scenarios
Lawrence Berkeley National Laboratory, 2024 United States Data Center Energy Usage Report (DOE, Dec 2024)
View the data
| US data centers | |
|---|---|
| 2014 | 58 TWh |
| 2023 | 176 TWh |
| 2028 low | 325 TWh |
| 2028 high | 580 TWh |
The growth was not smooth. For much of the 2010s, efficiency gains in servers and cooling, plus the shift from small server rooms to efficient cloud campuses, kept total use fairly flat even as computing grew. Berkeley Lab attributes the more recent acceleration largely to servers built for AI.
So the share you see today is the early part of a steeper curve. If the low 2028 case holds, use nearly doubles in five years. If the high case holds, it more than triples.
What Do Forecasts Say About Data Centers' Share of US Electricity by 2030?
They agree on direction and disagree on size. Here are the main published estimates side by side:
| Source | Year | Estimate |
|---|---|---|
| LBNL (2024 report) | 2028 | 325 to 580 TWh, about 6.7% to 12% of US electricity |
| EPRI (May 2024) | 2030 | 4.6% to 9.1% of US generation |
| IEA (April 2025) | Through 2030 | US data centers account for almost half of US electricity demand growth |
The ranges are wide because the inputs are uncertain. Nobody knows exactly how many accelerator chips will ship, how efficient the next generations will be, how many announced campuses will actually get power, or whether demand for AI services keeps compounding. Different groups also measure differently, using consumption versus generation, or national versus regional baselines. Our guide to why data center power forecasts disagree walks through how to read them.
From where I sit, the low end looks fairly likely. The high end is possible, but it depends on a lot going right for developers, from turbine deliveries to transmission upgrades.
How Does the US Compare With the Rest of the World?
The US is the largest single data center market by a wide margin. The International Energy Agency's Energy and AI report estimates that data centers worldwide used about 415 TWh in 2024, around 1.5 percent of global electricity, and that the United States accounted for 45 percent of that use.
Run the arithmetic and the US slice is roughly 0.45 × 415 ≈ 187 TWh for 2024. That lines up reasonably well with LBNL's 176 TWh for 2023, even though the two organizations use different methods and years.
The IEA projects global data center use rising to about 945 TWh by 2030. The US share of its own electricity is already well above the global average share, because so much of the world's cloud and AI capacity sits on American soil.
Where Does the Electricity Go Inside a Data Center?
Most of it powers the computers, and a smaller but meaningful slice keeps them cool. The IEA estimates that servers account for about 60 percent of data center electricity worldwide. Cooling ranges from around 7 percent in efficient hyperscale facilities to more than 30 percent in less efficient enterprise sites. Storage, networking, power conversion losses and lighting make up the rest.
That split explains why the national share grew slowly for years and then jumped. Through the 2010s, operators squeezed cooling overhead down and packed more work onto each server, offsetting growth. Once accelerator servers started shipping in volume, the server slice itself grew faster than efficiency gains could offset. Better cooling still helps, but it cannot cancel a surge in the number of power-hungry servers.
Why the National Average Hides the Real Story
The national share understates the strain in the places where data centers cluster. EPRI's 2024 analysis found that about 80 percent of US data center load sits in just 15 states. In those states, and especially in particular utility territories, data centers can be a double-digit share of electricity use.
The Energy Information Administration (EIA) has tracked this at the state level. Between 2019 and 2023, commercial electricity sales rose by about 14 billion kilowatt-hours in Virginia and 13 billion in Texas, the states with the fastest computing facility growth. EIA also estimated that computing made up about 8 percent of US commercial-sector electricity in 2024, and projected that share could reach 20 percent by 2050.
That concentration is why grid operators in places like Northern Virginia and Texas talk about data centers very differently from a utility in a state with few of them. A 4.4 percent national share can translate into a much larger slice of one utility's load growth.
What Does a Rising Share Mean for Power Supply?
It means new generation and new wires, and the biggest buyers are not waiting for utilities to plan it for them. Large cloud companies have signed long-term contracts for nuclear output, backed new gas plants, paid for utility upgrades and explored geothermal and small modular reactors. Our guide to hyperscaler power deals breaks down the main deal types and how they work.
For everyone else, a rising data center share shows up as longer interconnection waits, tighter equipment supply and, in some markets, pressure on capacity prices and retail rates. Whether that pressure lands on other customers depends heavily on how state regulators design large load tariffs.
4.4 Percent Today, Maybe 12 Percent Tomorrow: Reading the Share Right
A share quoted without its year, its geography and whether it is an estimate or a projection is not really a number yet. Ask those three things before you repeat any figure, including the 4.4 percent in this article.
If you are planning a project, the national figure is background. What matters is your utility's own load forecast, its queue of large load requests and its plans for new generation and transmission. Ask for those documents early. They will show you whether your region is in the 4 percent world or the 20 percent world, and that difference shapes everything from timelines to tariffs.