Electricity cost calculator

How to use this tool

1. Enter your values or choose a local file. Replace the example data with your own.
2. Review options, units and assumptions, then run the tool.
3. Check the result before copying or downloading it. Keep an original copy of important files.

Method & assumptions

Daily, monthly and yearly running cost of any appliance from its watts, hours of use and your price per kWh.

Worked example

Power (watts): 1,500
Number of devices: 1
Price per kWh: 0.16

→ Energy per day: 4.5 kWh
→ Cost per day: 0.72
→ Cost per month (30 days): 21.6
→ Cost per year: 262.8

Limits & important notes

Basic release. Review the result before relying on it. File limits, supported cases and processing requirements are shown above.

Content updated: 2026-10-10