Compare useful energy output against energy input to get efficiency and losses.
The efficiency is the share of total energy input that useful energy output represents, expressed as a percentage. The same figure is also shown per 1,000 and as a "one in every N" odds statement, which is easier to reason about when the rate is very small. Absolute counts hide scale — a rate normalises the number so you can compare periods, channels or cohorts of different sizes, where higher is better.
Energy Efficiency
Energy Efficiency = Useful energy output ÷ Total energy input × 100
Energy Efficiency = Useful energy output ÷ Total energy input × 100 The efficiency is the share of total energy input that useful energy output represents, expressed as a percentage. The same figure is also shown per 1,000 and as a "one in every N" odds statement, which is easier to reason about when the rate is very small.
Absolute counts hide scale — a rate normalises the number so you can compare periods, channels or cohorts of different sizes, where higher is better.
This calculator takes 2 inputs: Useful energy output, Total energy input. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.