Electricity Cost Calculator
Free online electricity cost calculator. Estimate how much any appliance costs to run per day, month, and year based on wattage, daily usage hours, and your electricity rate per kWh. Includes presets for common appliances. 100% client-side.
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What is Electricity Cost Calculator?
The Electricity Cost Calculator is a free browser tool that estimates how much an appliance costs to run. You enter its wattage, the number of hours it runs per day, how many days per month, and your local electricity rate per kWh. The tool converts watts to kilowatt-hours (kWh) and multiplies by your rate to show the daily, monthly, and yearly energy cost. It includes presets for common household appliances and supports any currency, making it useful worldwide.
Key Benefits
- See exactly how much each appliance adds to your electricity bill
- Compare old appliances with energy-efficient replacements before buying
- Identify hidden costs from devices left on standby
- Works with any currency and electricity rate worldwide
- Keep your data private with 100% local browser processing
Common Use Cases
- β’Budget monthly utility costs before the bill arrives
- β’Decide whether upgrading to an inverter AC or LED lighting pays off
- β’Estimate the cost of running a home server, gaming PC, or mining rig
- β’Compare electricity costs across different usage scenarios
- β’Teach energy literacy and the relationship between watts, kWh, and cost
How to Use the Electricity Cost Calculator
- Enter the appliance wattage: Type the power rating in watts (W) from the device label, or pick a preset like Air Conditioner (1200W).
- Set daily usage hours: Enter how many hours per day the appliance runs. Use the quick presets for common scenarios (1, 4, 8, 12, 24 hours).
- Enter your electricity rate: Type your local rate per kWh (check your utility bill) and select your currency symbol.
- Read the results: The tool shows estimated kWh consumption and cost for daily, monthly, and yearly periods instantly.
Key Features
- Instant kWh and cost calculation for daily, monthly, and yearly periods.
- 10 built-in appliance presets with typical wattage values for one-click estimates.
- Supports 10 currency symbols and any custom electricity rate per kWh.
- Adjustable usage hours with quick presets (1, 4, 8, 12, 24 hours).
- 100% client-side β no data leaves your browser, works offline after loading.