Electricity Cost Calculator

Calculate electricity costs for any appliance based on wattage, usage hours, and your electricity rate. See daily, weekly, monthly, and yearly estimates.

Calculate electricity costs for any appliance based on wattage, daily usage hours, and your electricity rate. See costs broken down by day, week, month, and year.

W
hrs
/kWh
8 hrs/day
0h6h12h18h24h
Cost estimates are based on constant usage. Actual costs may vary due to tiered pricing, demand charges, and seasonal rates. Formula: Cost = (Watts x Hours) / 1000 x Price per kWh.

How to Use This Tool

  1. 1

    Enter wattage

    Type the power consumption in watts, or click a common appliance button to auto-fill the wattage.

  2. 2

    Set daily usage

    Enter how many hours per day the appliance runs. Use the slider for quick adjustment.

  3. 3

    Enter electricity rate

    Input your electricity rate per kWh and select your currency. Check your utility bill for the exact rate.

  4. 4

    View cost breakdown

    Click 'Calculate Cost' to see estimated daily, weekly, monthly, and yearly electricity costs with kWh consumption.

Frequently Asked Questions

How do I find my electricity rate?
Check your electricity bill for the rate per kWh. In the US, the average is about $0.12/kWh, but rates vary by state and provider.
How is the cost calculated?
Cost = (Watts x Hours per Day) / 1000 x Price per kWh. This converts watts to kilowatts, multiplies by usage time, then by your rate.
Why might actual costs differ?
Many utilities use tiered pricing, time-of-use rates, demand charges, and seasonal adjustments that this simple calculator does not account for.
What is a kilowatt-hour (kWh)?
A kWh is a unit of energy equal to using 1,000 watts for 1 hour. A 100W light bulb running 10 hours uses 1 kWh.