Home Energy Cost Calculator
Work out what an appliance costs to run per day, month and year from its wattage, hours used and your unit rate.
Work out the running cost
Frequently Asked Questions
Watts times hours, converted to kilowatt-hours, times the rate from your bill.
Use your own, for a period you can actually measure. A calculator like this is only as good as the inputs, and the most common error is using a number that covers a different period or a different set of costs.
No. Everything is worked out in your browser and nothing is sent anywhere or saved.
We do not publish one, deliberately. Benchmarks for these measures vary enormously by sector, stage and how each company defines the inputs, so a number quoted without those definitions tends to mislead more than it helps.