About this plugin
Check what your appliances could cost to run in a typical week. Enter their input power and usage in a compact electricity worksheet to see estimated weekly energy, monthly cost and annual cost together.
The worksheet combines:
* Input power in watts, hours per day and days per week.
* The number of identical appliances in use.
* An editable electricity rate per kWh, using the currency selected by the site owner.
Use the input watts shown on the appliance label or in its specifications. A heater or air conditioner’s heating or cooling output is not its electricity input. For appliances that cycle on and off, the estimate depends on the usage assumption you enter.
Check your electricity bill for the appropriate usage rate. 30 AUD per kWh is an editable example, not a current tariff quote. The site owner can change that example and choose AUD, USD, EUR or GBP in Settings.
Weekly energy = watts ÷ 1000 × hours per day × days per week × units. Annual estimates use 365 ÷ 7 weeks; monthly estimates use annual ÷ 12. Energy multiplied by the rate gives the estimated cost.
Supply charges, time-of-use rates, demand charges and discounts are excluded. Actual consumption may differ because of thermostats, duty cycles and standby use. This is not electrical-work advice.
Add the block or [wattpencil_appliance_running_cost] shortcode. Each worksheet works independently, with labelled keyboard controls and a layout that adapts to narrow content areas. Save a plain-text cost summary or print the worksheet for your own reference.
Calculations run locally using bundled files, without a tariff service, account or API connection. The plugin makes no external requests and adds no analytics, cookies, lead capture or visitor-data storage. Inputs remain on the current page and disappear when you reload or leave; download a copy to keep them.
After the host page has loaded, the calculator itself does not need a network connection.
All functionality works without attribution.
Developed by Busselton Electrician.