About this calculator

Energy used = power (kW) × hours. Cost = energy × tariff. Useful for sizing solar, comparing appliances and budgeting heating.

Frequently asked questions

What does the kWh Energy Cost Calculator do?

Work out the running cost of any appliance from wattage, usage and price per kWh. Energy used = power (kW) × hours. Cost = energy × tariff. Useful for sizing solar, comparing appliances and budgeting heating.

Is the kWh Energy Cost Calculator free to use?

Yes. Every calculator on Calcora is free, works in your browser without sign-up, and can be embedded on your own website.

How accurate is the kWh Energy Cost Calculator?

Results are calculated in real time using industry-standard formulas. Treat the output as a well-informed estimate — always cross-check with local regulations, product datasheets, or a qualified electrical professional before committing to a purchase or a job.

What inputs does the kWh Energy Cost Calculator need?

Enter values for: Power (W), Hours per day, Price per kWh, Days. Sensible defaults are pre-filled where possible so you can start with a single change.

Can I embed the kWh Energy Cost Calculator on my own website?

Yes — copy the iframe snippet at the bottom of this page, or use the Embed Generator to customise the size. The embedded version stays in sync with the live calculator on Calcora.