Data Centre PUE Calculator
Calculate your PUE, benchmark against typical ranges, and explore optimisation ideas. PUE = Total Facility Energy / IT Energy (ISO/IEC 30134‑2).
What is PUE and why does it matter?
Power Usage Effectiveness (PUE) is a simple ratio that indicates how efficiently a data centre uses energy. It is calculated as Total Facility Energy divided by IT Equipment Energy. A lower PUE means more of your power is going to the IT load rather than overheads like cooling, power distribution, lighting, or humidification. In practice, PUE can be tricky to measure consistently because different organisations use different boundaries, time windows, and metering points. To keep things intuitive, this calculator uses a simplified approach to help newcomers understand the concept and see how small changes can affect efficiency. For formal reporting, refer to standards such as ISO/IEC 30134‑2 and ensure consistent measurement definitions.
Total power consumed by IT equipment (servers, storage, networking)
Total power consumed by entire data center facility
Your local electricity rate for cost analysis
PUE Optimization Strategies
Below are practical strategies used by data centres to reduce overhead energy and improve PUE. Consider your facility’s design, climate, and operational constraints when prioritising initiatives.
Cooling Optimization
Implement hot/cold aisle containment and optimize airflow management
Power Distribution
Upgrade to high-efficiency UPS systems and optimize power distribution
Free Cooling
Implement economizer cooling and evaporative cooling systems
AI Optimization
Deploy AI-powered cooling and power management systems