Last updated: August 7, 2026
How Much Power Does a Data Center Need?
Data center power demand ranges from about 0.5–5 MW for edge sites to 100–1,000+ MW for hyperscale campuses. Most large modern buildings draw 30–100 MW, and AI-driven campuses are now scaling toward 1,000 MW (1 gigawatt). The real constraint is rarely land — it’s deliverable grid capacity near a substation.
⚡ TL;DR — Power by Facility Size
- • Edge / small: 0.5–5 MW
- • Enterprise / colocation: 5–30 MW
- • Large facility: 30–100 MW
- • Hyperscale campus: 100–1,000+ MW
- • Bottleneck: available grid capacity + a utility willing to serve, not acreage
What Drives Power Demand
- Rack density: traditional racks draw 5–10 kW; AI/GPU racks 40–130+ kW
- Facility count: hyperscale campuses run many buildings, multiplying total load
- Cooling load: higher density needs more cooling power (reflected in PUE, typically ~1.1–1.5)
- Redundancy: N+1 / 2N designs size electrical infrastructure above the IT load
Why “Power-Ready” Land Matters
At these scales, the interconnection queue — not construction — is usually the long pole. Parcels near existing transmission and substation capacity, with a cooperative utility, can shave years off a project. That is what separates power-ready industrial sites and land near substations from land that is merely for sale. See our grid interconnection queue guide for how that approval process actually works. Some of the largest current campuses are pairing land with dedicated new generation rather than relying only on existing grid headroom — Meta's Cheyenne, Wyoming campus plans 365 MW of solar plus a 200 MW battery system, while Google's Jackson County, Alabama campus is tied to a TVA agreement that includes a small nuclear power commitment.
Figures are typical industry ranges and vary by design, region, and utility. Not engineering or financial advice.
How Utilities Evaluate a Large Load Request
Requesting 30 MW is a very different conversation for a utility than requesting 300 MW. Above a certain size — which varies by utility and by how much headroom already exists on the local substation — a request triggers a formal system impact study rather than a routine service upgrade. That study looks at:
- Existing loading on the substation and nearby transmission, and how much headroom is actually left
- Whether new generation, a new substation, or transmission upgrades are needed to serve the load reliably
- Where the request sits in the interconnection queue relative to other large loads already waiting — a real constraint in fast-growing markets
- Cost allocation: who pays for any required upgrades, and on what timeline the utility can recover that cost
This is why two sites with identical acreage and similar distance from a substation can have wildly different timelines — one might be near a substation with spare capacity, the other behind one that's already loaded up by other large customers in the queue.
Phasing Reduces Risk on Both Sides
Few projects request their full eventual capacity on day one. It's common to contract for an initial phase — often 30–50 MW of a much larger planned campus — with defined rights (and sometimes financial commitments) to expand as later phases are built and the utility brings on more capacity. For a landowner, this matters because it means a developer's initial interest in a site doesn't always reflect the ultimate scale of what gets built there — and it's part of why acreage for expansion, not just the acreage needed for phase one, factors into which sites developers prioritize.
Frequently Asked Questions
How much power does a data center need?
It depends on scale. Edge and small sites run about 0.5–5 MW; enterprise and colocation facilities 5–30 MW; large facilities 30–100 MW; and hyperscale campuses 100–1,000+ MW. A single large modern building commonly draws 30–100 MW, while AI-focused campuses are pushing toward 1,000 MW (1 gigawatt) and beyond.
What is a 1,000 MW (1 GW) data center?
A 1,000 MW campus is a gigawatt-scale development — the size now being announced for large AI training clusters. It is not a single building but a multi-building campus, and it needs land adjacent to major transmission and substation capacity, since utility interconnection at that scale can take years.
How much power does an AI data center use compared to a traditional one?
Far more per square foot. Traditional server racks draw roughly 5–10 kW each; AI/GPU racks draw 40–130+ kW each. That density is why AI facilities are measured in hundreds of megawatts and why proximity to available grid capacity now matters more than land price.
Why is power the main constraint on data center sites?
Because land is easier to find than megawatts. Available, deliverable grid capacity near a substation — and a utility willing to serve on a workable timeline — is the scarce input. That is exactly what makes a parcel 'power-ready' rather than just available.
How does a utility decide if it can serve a large data center load?
The utility runs a system impact study looking at existing substation and transmission loading, whether new generation or upgraded lines are needed, and how the added load interacts with other large customers already in the interconnection queue. For loads much larger than existing local demand, that study — not permitting or construction — is usually the long pole in the project timeline.
Can a site be phased to reduce the initial power requirement?
Yes, and it's common. Developers often contract for an initial phase (say 30–50 MW of a larger planned campus) with defined rights to expand as later phases are built and the utility brings on additional capacity. Phasing reduces upfront interconnection risk but requires the utility and developer to agree on a capacity reservation structure for future phases up front.
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