Electricity cost calculator
The purchase price is only part of the cost. Estimate daily, monthly and yearly electricity costs using your own tariff, then compare another appliance.
Illustrative example
Appliance A: 1000 W × 1 hours/day at £0.25 per kWh.
| Measure | Appliance A |
|---|---|
| Energy per day | 1.000 kWh |
| Daily cost | £0.25 |
| 30-day cost | £7.50 |
| Yearly cost | £91.25 |
After calculating, copy this page's address to share your inputs and results. No account is needed.
This estimates electricity for these appliances only, not your whole bill. It excludes standing charges, purchase price and maintenance. Actual consumption varies with settings, cycling, usage and conditions. A lower running cost does not mean two appliances do the same job.
Compare products, not just watts
Check capacity, features, evidence and retailer prices alongside running cost.
Browse buying guidesHow the calculation works
Daily kWh = watts ÷ 1,000 × hours used. Multiply daily kWh by your electricity unit rate for the daily cost, by 30 for the monthly estimate and by 365 for the yearly estimate.
For the illustrative 1,000 W appliance used for one hour a day at 0.25 per kWh, that is 1 kWh a day, 0.25 a day, 7.50 for 30 days and 91.25 for 365 days in your selected currency.
Can I use this for an air fryer or dehumidifier?
Yes, but use measured average power and actual running time where possible. Using a maximum wattage assumes it draws that power for the entire time. The calculator does not claim model-specific energy use.
What about a variable or time-of-use tariff?
Calculate each period separately using the applicable rate and operating hours, then add the results. Negative rates are not supported by this calculator.
Can it tell me whether a new appliance pays for itself?
It compares electricity cost, not overall value. Consider the price difference, whether both appliances meet the same need, maintenance and how your usage may change before making a purchase.