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How did we calculate the Power of 10p?

 

The cost of running any device fluctuates based on the tariff you pay to your energy supplier, the energy efficiency of the appliance and of course the length of time you use it. Your tariff itself will also fluctuate based on your supplier, your package and your location. We have tried to be as standardised as possible in our calculations and in order to do this we chose a standard tariff from the nation’s largest supplier. We also used readily available and widely used appliances. The full details of how we calculated the energy usage these recipes required is as follows:

Tariff choice

The tariff used in the recipes is a national average of the British Gas standard variable rates. It does not include the standing charge which may sometimes be included.

Calculation

The energy we used is calculated on the following formula:

t = C / (R * P);

  • P is the tariff in pence per kWh
  • R is the power rating of the appliance in kW
  • t is the running time in hours
  • C is the cost in pence