Data Center Power Usage Effectiveness
Definition
Measures how efficiently a data center uses energy by comparing the total power consumed by the facility to the power consumed by IT equipment. The formula quantifies the overhead required to support IT operations such as cooling, power distribution, and lighting relative to the energy directly used for compute, storage, and networking. A PUE value closer to 1.0 indicates higher energy efficiency, meaning a greater proportion of facility power is delivered to IT equipment rather than supporting infrastructure. This KPI was developed by the FinOps for Data Center Working Group .
Formula, as published
Power Usage Effectiveness (PUE) = Total Facility Power / IT Equipment Power
- Data sources:
- Facility Power Metering Systems Data Center Infrastructure Management (DCIM) Tools Utility Provider Billing or Interval Data
Calculate it
Example values to start with; replace them with yours.
How to measure it
Total facility power over the power that reaches IT equipment. 1.0 would mean no power lost to cooling and distribution; every real facility is above it.
Measure over a full year: cooling load follows the seasons, so a winter month flatters the figure.
From the FinOps Foundation
More Reporting & Analytics KPIs
Definition and formula: Data Center Power Usage Effectiveness, FinOps KPI library, FinOps Foundation, licensed CC BY 4.0, read 16 Oct 2026. Changed: HTML removed, dashes and British spellings changed, formula split from its data sources and examples. The calculator and the notes are Finitizer’s.
Measured once, a KPI is a number. Tracked daily, it is a practice.
Finitizer computes the KPIs your billing data supports every day, by team and product, across AWS and Google Cloud.
See how Finitizer works