Energy - PowerFree

Electricity Bill Calculator

Estimate your monthly electricity bill based on appliance usage, wattage, hours of use, and your electricity tariff rate.

Enter Values

Total Wattage (W)

Hours of Use per Day

Days per Month

Electricity Rate (per kWh)

Result

Enter values above and click Calculate to see your result.

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Formula

Core Formula

\text{Cost} = \frac{\text{Watts} \times \text{Hours} \times \text{Days}}{1000} \times \text{Rate}

How it works: Converts watt-hours into kilowatt-hours (kWh), then multiplies by your electricity rate to find the total cost.

Worked Example

AC unit 1500W, 8 hrs/day, 30 days, rate $0.12/kWh → 1.5 × 8 × 30 = 360 kWh × $0.12 = $43.20/month.

Frequently Asked Questions

How do I find my appliance wattage?

Check the label on the appliance or its user manual. Common values: LED bulb 10W, Fan 75W, AC 1500W, Fridge 150W.

What is kWh?

A kilowatt-hour (kWh) is 1000 watts used for 1 hour. It is the standard unit electricity companies use to bill you.

Can I add multiple appliances?

Yes. Add up the wattage of all appliances running at the same time, or calculate each separately and sum the costs.

How can I put this Electricity Bill Calculator on my blog or website?

Yes, the Electricity Bill Calculator is fully embeddable. Tap "Embed" above to configure appearance and copy the code. It is free to use, works on any platform (HTML, WordPress, CMS), and adjusts to any screen size automatically. Visit calculory.com/services/embed-calculators for the complete guide.

AI Assistant

Ask about this calculator

I can help you understand the electricity bill calculator formula, interpret your results, and answer follow-up questions.

Try asking

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