Methodology

At POWERCAL, transparency is a priority: each calculator shows the formula used, the input units and the limitations of the calculation. All calculations run in your browser; we don't send your data to any server.

General assumptions

• Standard 30-day month, 365-day year.
• kWh price is entered manually. Default figures are indicative and not updated in real time.
• Unless stated, calculations do not include VAT, electricity tax or grid tolls.

Limitations

These tools are estimates, not bills. For important decisions cross-check with your supplier and your actual bill.