Electricity Bill Calculator - Estimate Your Monthly Power Cost

Appliance ▲▼

W ▲▼

h/day ▲▼

days ▲▼

kWh/mo ▲▼

$/mo ▲▼

108

$14.04

10.8

$1.40

$1.56

How to use this tool

Set your rate. Enter your electricity rate ($/kWh) from your utility bill.
Add appliances. Type a name, wattage, daily hours, and days per month - or pick a preset.
View breakdown. See per-appliance kWh and cost, plus total monthly and annual estimates.

How to Estimate Your Electricity Bill

Enter each appliance you use, its wattage, how many hours a day you run it, and how many days per month. The calculator multiplies (watts ÷ 1000) × hours × days × rate to give you a cost-per-appliance breakdown and a total monthly estimate.

What Is a kWh?

A kilowatt-hour is the standard unit for electricity billing. It equals 1,000 watts running continuously for one hour. A 100-watt bulb left on for 10 hours uses 1 kWh. If your rate is $0.13/kWh, that 1 kWh costs 13 cents.

How to Find Your Electricity Rate

Check your utility bill for the cost per kWh. The US average is about $0.13/kWh, but rates vary significantly by state and provider. California averages ~$0.22/kWh while Louisiana averages ~$0.09/kWh.

Frequently asked questions

How is the electricity cost calculated?

Cost = (wattage ÷ 1000) × hours/day × days/month × rate/kWh. The tool sums up all appliances to estimate your total monthly and annual bill.

What is a kWh?

A kilowatt-hour (kWh) is the unit on your utility bill. It equals 1,000 watts running for 1 hour. A 100W bulb running for 10 hours uses 1 kWh.

What is the average electricity rate in the US?

The US average residential rate is about $0.13/kWh, though it varies widely by state - from ~$0.09 in Louisiana to ~$0.24 in Hawaii.

How do I find my appliance wattage?

Check the label on the back or bottom of the device, or look for the wattage in the manual. Our presets include typical values for common household appliances.