Electricity cost calculator
See what it costs to run a light, a laptop, a fridge or a heater, from its watts and your price per kilowatt-hour.
0 viewsThe watt buttons are typical figures, not a measurement of your own appliance. Check its label.
Private by design: this tool runs in your browser. Nothing you add is uploaded.
How to use it
- Pick an example device, or type the watts from its label.
- Set how many hours a day it runs.
- Type what you pay for one kilowatt-hour (kWh).
- Read the cost per day, month and year.
Questions and answers
Where is my price per kWh?
On your electricity bill, often called the energy rate or unit rate. Delivery charges may be extra.
How many watts does my device use?
Look for a label on the back or the plug, such as "1500 W". A plug-in power meter gives the real figure.
What is a kilowatt-hour?
Using 1,000 watts for one hour. A 100-watt TV on for 10 hours uses 1 kWh.
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