Data Center PUE & Electricity Cost Calculator
PUE measures facility overhead relative to IT energy; it does not measure useful compute output or total project economics.
What it calculates
IT equipment load is only part of a data center’s electricity demand. Power usage effectiveness adds cooling, power conversion, and facility overhead. This calculator converts IT megawatts through PUE and utilization into facility load, annual electricity consumption, and annual power cost.
How this data center pue & electricity cost calculator works
The calculator multiplies IT load by PUE to estimate total facility load, then applies average utilization and 8,760 hours per year. Electricity cost equals annual megawatt-hours multiplied by price per MWh.
Formula
Annual MWh = IT MW × PUE × utilization × 8,760
Demand charges, transmission, taxes, on-site generation, power contracts, seasonal PUE, water use, and grid constraints can change actual cost.
Primary specifications
Before you use the result
Assumptions
- • PUE and utilization represent annual averages.
- • Power price is an all-in scenario rate in dollars per MWh.
- • The IT-load and PUE boundary use consistent measurement definitions.
Quick start
- 1. Enter credible operating IT load rather than only announced nameplate capacity.
- 2. Use a measured or scenario PUE and average load factor.
- 3. Stress power prices, curtailment, ramp timing, and contract structure.
Inputs and units
| Input | Unit | Default |
|---|---|---|
| IT equipment load | megawatts | 100 MW |
| Power usage effectiveness | ratio of facility power to IT power | 1.25 PUE |
| Average load factor | percent | 75% |
| Electricity price | US$ per megawatt-hour | $60.00 per MWh |
Worked example (hypothetical)
Data Center PUE & Electricity Cost Calculator: worked example
Hypothetical example using the calculator's default inputs. The numbers are illustrative, not a forecast or a quote.
| IT equipment load | 100 MW |
|---|---|
| Power usage effectiveness | 1.25 PUE |
| Average load factor | 75% |
| Electricity price | $60.00 per MWh |
| Annual electricity cost | $49,275,000 |
|---|---|
| Facility load at full IT load | 125 |
| Annual electricity use | 821,250 |
With these inputs, the annual electricity cost is $49,275,000.
Frequently asked questions
What does a PUE of 1.25 mean?
Total facility energy is modeled at 1.25 times IT-equipment energy, with 0.25 representing facility overhead.
Is lower PUE always better?
Lower facility overhead is generally more efficient, but PUE does not measure compute utilization, workload value, water use, or reliability.
How many hours are in the annual calculation?
The model uses 8,760 hours and applies the selected average utilization or load factor.
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Apply it to research
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Data Center PUE & Electricity Cost Calculator shows the arithmetic. Members get the monthly call that decides which inputs matter, plus written breakpoints when the facts move. $39/month or $249/year.
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