Electricity Cost Calculator
Niche ToolsCalculate electricity costs
Daily
$0.10
0.800 kWh
Total (30 days)
$2.88
24.000 kWh
Monthly (30 days)
$2.88
24.000 kWh
Annual (365 days)
$35.04
292.000 kWh
About Electricity Cost Calculator
Calculate electricity cost from wattage, usage hours, and rate per kWh.
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Frequently Asked Questions
How does the electricity cost calculator work?
Enter the wattage of your appliance, daily usage hours, number of days, and your electricity rate in dollars per kWh. The tool computes energy consumption and cost for daily, custom period, monthly, and annual timeframes.
How does multi-appliance mode work?
Enable the multi-appliance toggle to add multiple devices with individual wattage and usage hours. The calculator totals the monthly and annual electricity cost for all devices combined, giving you a whole-home energy estimate.
What appliance presets are available?
The calculator includes 12 presets covering common household devices from LED bulbs (10W) to air conditioners (1500W). Selecting a preset auto-fills the wattage field so you can quickly estimate costs without looking up specs.
Is my data safe?
Yes! All processing happens entirely in your browser. Your data is never sent to any server. No data is collected, stored, or transmitted.
Where can I find my electricity rate?
Your electricity rate appears on your utility bill as a cost per kWh. US residential averages range from $0.10 to $0.20 per kWh depending on state and provider. Enter your actual rate for the most accurate cost estimate.
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