Electricity Cost Calculator

Estimate how much an appliance costs to run per day, month, and year.

100% Browser-Based

Files Never Leave Your Device

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Zero Data Collection

How It Works

Type the appliance wattage or pick a preset.

Enter daily usage hours and your electricity rate ($/kWh).

See daily, monthly, and annual costs with kWh breakdown.

Quick-pick common appliances like LED bulbs, laptops, AC units, EV chargers.

See costs across all three time periods simultaneously.

View energy consumption in kilowatt-hours alongside dollar costs.

All calculations run locally in your browser.

Where do I find my electricity rate?

Check your electric bill — it shows $/kWh. US average is about $0.12/kWh.

What if my appliance shows amps instead of watts?

Multiply amps × voltage (usually 120V in US) to get watts.