Estimate the energy consumption of website delivery.
Energy consumption is proportional to data transferred, so page weight reduction cuts energy directly. The commonly used intensity figure covers data centre, network and device energy combined. Halving page weight halves delivery energy, which makes performance optimisation and sustainability the same work.
Website Energy Use
Energy = data transferred × energy intensity per gigabyte
Energy = data transferred × energy intensity per gigabyte Energy consumption is proportional to data transferred, so page weight reduction cuts energy directly. The commonly used intensity figure covers data centre, network and device energy combined.
Halving page weight halves delivery energy, which makes performance optimisation and sustainability the same work.
This calculator takes 4 inputs: Monthly pageviews, Average page weight, Energy intensity of data transfer, Energy price per kWh. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.