Plug-in electricity usage monitor
Plugs in between the wall and any single appliance to show its real, measured electricity use instead of an estimate.
Compare on AmazonAppliance True Cost Calculator
Pick an appliance, confirm the wattage and hours per day, and see exactly what it costs to run per day, month, and year at your electricity rate.
What it costs to run
$2.12Per day
$63.45Per month
$771.98Per year
The formula
kWh/day = watts ÷ 1000 × hours/day
Cost/day = kWh/day × (rate ÷ 100)
That works out to 9.00 kWh per day at the numbers above.
Save on this appliance
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Compare on AmazonFrequently asked questions
Why does this differ from my actual utility bill?
Nameplate wattage is often a maximum, not a constant draw. Cycling appliances like fridges, your exact usage pattern, and your utility's rate structure can all shift the real number.
Where do I find my appliance's actual wattage?
Check the nameplate or label on the unit itself, usually on the back or bottom, or the manufacturer spec sheet.
Where do I find my electricity rate?
Check a recent utility bill; it is usually listed per kWh. The default here is a national or state average.
Does this cost anything to use?
No, the calculator is free.