Electricity cost calculator
Find out how much your household appliances cost to run each month. Enter your current electricity rate from a recent bill, or use one of the reference rates below. Use the results to see whether switching to a cheaper tariff could reduce your running costs.
Running costs are estimates based on the wattage and usage figures shown. Actual costs depend on your specific appliance, usage habits, and the tariff available at your address. This calculator is for educational purposes only.
Select an appliance
Your usage and rate
Find this on your energy bill or statement. The Ofgem price cap rate from July 2026 is 26.11p/kWh.
Your estimated running costs
Your rate matches the Ofgem price cap. Update the rate field above with the p/kWh figure from your own bill to see your personal cost.
Last checked June 2026
How this calculator works
Electricity consumption is measured in kilowatt-hours (kWh). To calculate how much an appliance costs to run, we convert its wattage to kilowatts (dividing by 1,000), multiply by the number of hours it runs per day, then multiply by 30.4 to get a monthly figure. We then multiply by your electricity rate in pence and divide by 100 to convert to pounds.
Monthly cost = (Watts ÷ 1,000) × Hours per day × 30.4 × Rate (p/kWh) ÷ 100
Appliance wattages shown are typical values. Your specific appliance may differ. Check the label on the appliance or its manual for the exact wattage. Running costs are estimates and do not account for variations in usage patterns or energy tariff standing charges.
Find your regional price cap rate · Estimate your full annual bill
Do you own an electric vehicle? Try our EV charging cost calculator to see what your home charging costs per year.
See if you could pay less on every appliance
These calculations show what your appliances cost at current rates. Compare tariffs at your postcode to see if a cheaper rate is available at your address.