Energy and PUE
Data Center Energy Cost and PUE Calculator
Use this calculator to estimate annual facility energy consumption and cost from IT load, utilization, PUE, rates, and demand charges.
It makes PUE financially visible by showing how each 0.01 change in PUE affects annual kWh and dollars at AI-scale load.
How to use this calculator
Use when comparing markets, cooling designs, utility tariffs, or PUE improvement projects for AI-scale capacity.
- 01
Enter the buyer scenario
Start with the editable energy and pue inputs and replace defaults with current quotes, tariffs, engineering values, or buyer assumptions.
- 02
Review the modeled outcome
Use the modeled outcome, decision checks, and copied brief to compare the scenario against buyer constraints.
- 03
Verify the result before acting
Check the caveats, source table, and related guides before treating the output as a quote, bid, or final site decision.
Calculator inputs
Scenario defaults are editable. Replace them with current quotes, utility tariffs, tax counsel inputs, or engineering values before relying on the output.
Modeled energy case
Modeled outcome
Use interval load data and tariff sheets for investment-grade pricing, then test PUE improvements against actual cooling design.
Average IT load
23.4 MW
Annual facility energy
270,579 MWh
Energy cost
$20.29M
Demand cost
$4.28M
Total annual cost
$26.07M
PUE improvement savings
$1.49M
Decision checks
- Annual facility energy: 270579 MWh
- Energy cost: $20.29M
- Demand cost: $4.28M
How does the energy and pue model work?
The calculator converts average IT MW into annual IT kWh, multiplies by PUE for total facility kWh, applies energy and demand charges, and adds fixed utility fees. The improvement case subtracts the buyer-entered PUE reduction to show annual avoided energy cost. PUE is treated as a planning ratio, not a complete sustainability score, so water, carbon intensity, curtailment, and tariff structure should be reviewed separately.
What should buyers verify before using the result?
- Tariffs may include ratchets, coincident peak charges, riders, taxes, and utility infrastructure agreements not captured in a simple rate.
- PUE does not measure IT utilization, water use, carbon intensity, or power availability.
- Use metered intervals and tariff sheets for investment-grade modeling.
Related guides and tools
Which sources support this energy and pue model?
| Source | Use in this tool | Link |
|---|---|---|
| Uptime Institute Global Data Center Survey 2025 | Data center efficiency and operations benchmark context. | Open |
| LBNL PUE comprehensive examination | Foundational PUE metric definition and limitations. | Open |
| Flexential power usage effectiveness explainer | PUE definition and operational context. | Open |
| DOE Better Buildings data centers resources | Federal resources for data center energy efficiency. | Open |
| U.S. EIA Electric Power Monthly | Electricity price and sales context for power cost assumptions. | Open |
| ASHRAE 2021 equipment thermal guidelines reference card | Thermal class reference for air and liquid-cooled IT equipment. | Open |
| CBRE North America Data Center Trends H2 2025 | Market supply, vacancy, and leasing pressure across North America. | Open |
| JLL 2026 Market Outlook for Global Data Centers | Global market outlook, cost, site selection, and power context. | Open |