Power Usage Effectiveness (PUE) is a standard that many data centres use to measure the energy efficiency of their facility. Put simply, PUE is a ratio of the amount of power needed to run and cool your data centre compared to the power used by the IT equipment within your data centre.


To achieve maximum efficiency, and keep your energy costs and carbon emissions to a minimum, you should aim to optimise your PUE score by reducing the amount of energy used to do anything other than run your IT equipment.

Use our calculator to understand your current PUE score today and receive advice from our experts on how to improve it.

Step 1: Calculate your current PUE

Before you can begin to improve your data centre’s efficiency, you need to understand your current PUE score. Fill in the fields below to calculate your data centre’s PUE.

Your Current PUE

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Annual Power Usage (kW/h)

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Annual Power Cost (£)

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Annual Carbon Footprint (Tonnes)

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