The ratio of the Actual emission to the Standard emission, where 50 corresponds to a 1:1 ratio:
EPC Rating = (BER / SER) × 50
The band letter and colour corresponding to this (as also shown on the EPC) is shown under the Actual emission figure.
The Part L and Typical bands are also shown, based on a similar formulae (the numerical rating values are shown on the EPC).
Part L Rating = (TER / SER) × 50
