PUE Calculation

Calculation of Power Usage Effectiveness, a predominate data centre measurement metric for establishing data centre energy efficiency is simple. However, the collection of the data required as input to the calculation is not always as simple.

The calculation requires two main measurements; Total Facility Power and IT Equipment Power.

Total Facility Power includes the power consumed by all of the equipment included under the definition all IT Equipment Power, such as, servers, storage, switches, workstations, printers and all of the power used in the power delivery, cooling, air conditioning, UPS. Lighting and other ancillary power consumed in the data centre is also included.

IT Equipment Power includes all IT equipment used in the delivery of an application, such as, servers, storage, switches, workstations, printers and any other service delivery equipment.

Calculation of PUE is expressed as :

For an understanding of what a PUE means, see PUE and other pages on this site. Use the PUE Calculator to work your own PUE calculation.

PUE is a closely related metric to DCiE and they can be considered as the inverse of each other.