This calculator uses the average watt rating (100 Watts) for a Telephone. You can input your Telephone’s details to calculate the exact usage and cost of your device.
Enter how many hours per day you estimate you run your Telephone. If it is less than one hour use a decimal. For example, 30 minutes would be .5 and 15 minutes would be .25.
Input the wattage of your Telephone. If you are unsure enter the average wattage for a Telephone: 4.5.
The average Telephone uses 4.5 watts. Your devices wattage may be different depending on the brand, size, or other factors. You can generally find the wattage of your Telephone in the user manual or on the device itself.
Enter the price per kilowatt-hour (kWh) you pay for electricity. If you are unsure you can use the average rate per kWh in the US (10 cents) or find the kWh rate in your area here.
