Data Centre PUE Calculator

Data Centre PUE Calculator

Calculate the PUE (Power Usage Effectiveness) of your data centre.

PUE (power usage effectiveness) is a widely used metric that provides a guide to the energy efficiency of your data centre by measuring the power used by IT resources relative to the total facility load. New data centres with the latest high efficiency power and cooling plant can achieve a PUE as low as 1.2 while the UK average is approximately 1.8. However, older data centres should be able to attain a PUE of 1.4 by adopting best practise measures.

AIT provides innovative advice and solutions to make it easier to adopt best practise, reduce PUE and cut Data Centre energy costs.

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IT Load (kW)
Facility Load (kW)

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PUE Definitions
Efficiency PUE Definition
Inefficient 3 Old plant or poorly managed
Average 1.8 Mix of old & new plant with some use of best practise
Efficient 1.4 Well managed using best practise
State of the Art 1.2 Newly built with high efficiency plant

Where PUE is Power Usage Effectiveness; a standard metric devised by the Green Grid as a guide to Data Centre efficiency.

PUE = Total Facility Load (including IT Load, cooling/lighting and electrical systems) divided by the IT Load.

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