Electricity Cost Calculator

Calculate the cost of running electrical appliances based on power consumption and usage time.

Power (Watts)

Usage (hours/day)

Electricity Rate ($/kWh)

Days per Month

Daily Cost

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Monthly Cost

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Yearly Cost

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kWh per Month

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CO\u2082 Estimate (monthly)

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How It Works

kWh = (Watts \u00d7 Hours) / 1000. Cost = kWh consumption \u00d7 electricity rate. CO\u2082 estimate uses average US grid emission factor of 0.92 lbs CO\u2082 per kWh.

About this Calculator

The Electricity Cost Calculator is a free, easy-to-use tool for cost, kWh, appliance. Simply enter your values and get instant, accurate results — no signup, no ads, no tracking. All calculations run locally in your browser, so your data stays completely private.

Privacy Note: All calculations are performed locally in your browser. No data is ever sent to a server or third party.