E7 estimate

Estimate your Economy 7 usage

Please enter the number of Economy 7 kiloWatt hour units (your night usage) used, as shown on your last bill:
Please enter the number of day units, as shown on your last bill:

Your night time usage, as a percentage of your total usage %

If you do not have a bill, and are not sure how much energy you use, you should contact your electricity supplier.