Enter two meter readings and the rates from your latest tariff for a clear estimate of usage and standing charges.
The familiar calculation from the original site, explained more clearly.
We subtract the previous meter reading from the current reading to find the kilowatt hours used.
Your usage is multiplied by the unit rate, then the daily standing charge is added for the billing period.
Keep VAT off for inclusive figures, or add 5% when working from VAT-exclusive rates.
Choose an appliance, enter your electricity rate and see daily, monthly and yearly costs. Compare different routines to see what you could save.
Try the appliance cost calculator →Enter the older reading first and the newer reading second. Ignore digits shown in red and numbers after a decimal point. Economy 7 meters have two readings that should be calculated separately.
Learn how to read your meter →Simply copy the unit rate and standing charge shown on your bill—there is no account connection or sign-up.
Review your supplier
Calculate electric car charging costs at home in the UK, compare standard and off-peak rates, work out cost per mile and check charger grants.
Read article
Check UK power cut compensation rules, 2026 payment amounts, time limits and claim steps, including severe weather and Northern Ireland differences.
Read article
Find what uses the most electricity in a UK home, compare appliance running costs, calculate kWh and identify the best places to cut your bill.
Read article