Electricity Usage & Bill Calculator

Estimate the kWh and monthly cost of your home appliances, and find which one drives up your bill.

This tool runs entirely in your browser — no data is uploaded to our servers.

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Electricity bill going up and not sure why? Enter your appliances, their wattage and daily hours to see each device’s monthly kWh and cost, and which one uses the most.

A list of common appliances with realistic typical wattages (air conditioner, fridge, water heater, washer…) is included and fully editable.

How to use it

  1. Enter your price per kWh and days of use.
  2. Choose appliances and adjust wattage, hours and quantity.
  3. Add more devices as needed.
  4. Read monthly and yearly cost and the biggest consumer.

Features

  • 15 common appliances with realistic values.
  • Usage and cost per device.
  • Monthly and yearly totals.
  • Biggest consumer and its share.
  • Your list is saved.

Tip: Water heaters, air conditioners and space heaters are usually the largest share. One hour less of AC per day saves about 36 kWh a month.

Privacy

The tool runs in your browser and your data is not sent to our servers. Free, with no sign-up.

Frequently asked questions

Where do I find the wattage?

On the label or manual, in watts (W). If given in amps: watts = amps × voltage.

Why only 60 W for the fridge?

Its compressor cycles on and off; 60 W is a realistic all-day average for a modern fridge.

Tiered tariff?

Enter the average price per kWh of your tier (bill amount before fees ÷ kWh).

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