Energy consumption calculator (kWh & cost)
Find out how much an appliance costs in energy per month, in kWh and money.
Monthly cost
$90.00
Monthly consumption120 kWh
Cost per day$3.00
Cost per year$1,080.00
The kWh rate varies by utility; check your power bill.
How the calculation works
kWh = (power in W ÷ 1000) × hours/day × days and cost = kWh × price per kWh.
Frequently asked questions
Where is the appliance power?
On the product label or manual, in watts (W).
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Updated on June 17, 2026 · by Rafael Rossi · Methodology & sources