Electricity Bill Calculator
Enter your appliances, their wattage, daily usage hours, and your electricity rate to estimate your monthly bill. Add or remove rows as needed. No signup, runs entirely in your browser.
| Appliance | Watts | Hours/day | kWh | Cost | |
|---|---|---|---|---|---|
| 108.0 | $14.04 | ||||
| 12.0 | $1.56 | ||||
| 180.0 | $23.40 |
Tips to Reduce Your Electricity Bill
Target the biggest consumers
Air conditioning, electric water heaters, and clothes dryers are typically the top 3 energy consumers. Focus reduction efforts there first.
Standby power
Devices on standby (TVs, game consoles, chargers) use 1–5W continuously. A 3W standby device running 24/7 costs ~$3/year — multiply by 10 devices and it adds up.
LED vs incandescent
Replace a 60W incandescent bulb with a 9W LED. For 4 hours/day, that saves ~18 kWh per bulb per year — about $2.50 saved per bulb annually.
Find your rate
Your electricity rate is on your utility bill under "Energy Charge" or "kWh Rate." Using the correct rate gives you accurate estimates rather than national averages.
Frequently Asked Questions
How is the electricity bill calculated?
Energy consumption is calculated as: kWh = (Watts / 1000) × hours per day × days. The cost is then: kWh × rate per kWh. Each appliance is calculated separately and summed for the total bill.
What is a typical electricity rate?
US residential rates average around $0.13–$0.17 per kWh depending on the state. Hawaii is the highest at ~$0.44/kWh; Louisiana is among the lowest at ~$0.10/kWh. Check your utility bill for your exact rate.
How do I find the wattage of my appliances?
Check the label on the back or bottom of the appliance. Most show wattage directly. If only voltage and amperage are listed, multiply them: Watts = Volts × Amps. You can also look up typical values for common appliances online.
Can I calculate weekly or yearly bills?
Yes — change the "Days in period" field to 7 for weekly or 365 for yearly estimates. The calculator multiplies by the number of days you enter.
Why does my actual bill differ from the estimate?
Actual bills include distribution charges, taxes, and fees beyond the raw energy cost. Also, appliance wattage varies with usage — an air conditioner runs at full capacity only some of the time. Treat the result as an estimate.
Is my data stored?
No. All calculations run locally in your browser. Nothing is sent to any server.