To use this form, fill in the quantity you have for each item, the number of hours you typically have the item powered on each day, and the energy usage of the item. The energy usage is typically found in the product documentation or on a label affixed to the item. If you do not know the energy usage, leave it blank and a default value will be used. Once you have filled out the form, click the Calculate button. A summary of your energy usage and cost will appear below the form.

You will also need to put in the cost per kWh (kilowatt hour) your utility company charges you for the energy and the delivery more accurate result. You can find this cost on your electric bill or by calling your power company. If you do not know your kWh cost, leave this box blank and a default value will be used.

This web form will remember what you typed in so you can re-calculate with different values without having to re-fill the form in its entirety. Once you exit the web page or close your web browser, your entries will be lost.

Formula used for calculating energy used: Energy(kWh/day) = P(Watts) x t(hours/day) / 1000(W/kW))

Formula used for calculating cost to power a device: Cost($/day) = Energy(kWh/day) x Cost(cent/kWh)

The energy usage and calculated cost shown here are to be used for entertainment purposes only and may not reflect your true usage and cost.