WattPocketTry the calculator

What does an appliance cost to run?

Enter the wattage, daily runtime, and electricity rate. You’ll see daily, monthly, and yearly estimates you can adjust for your home.

W
hr
¢/kWh

Find your state average

$45.19/ month
$1.51/ day
$549.84/ year

This setup uses about 240 kWh in a 30-day month.

A renter uses a phone while adjusting the controls on a window air conditioner.
Use the appliance controls or label to find a starting wattage.

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U.S. Energy Information Administration rate period April 2026 · retrieved July 16, 2026. View the source table.

Electricity prices by state

Compare the latest residential rate with the U.S. average of 18.83¢ per kWh.

View all states and D.C.
StateAvg. rateMonthly cost*Vs. U.S. avg.View
California35.25¢/kWh$317.25+87%
Texas16.99¢/kWh$152.91-10%
Florida15.38¢/kWh$138.42-18%
New York29.45¢/kWh$265.05+56%
Illinois20.47¢/kWh$184.23+9%
Washington14.36¢/kWh$129.24-24%

*Illustrative energy charge at 900 kWh per month. Fixed fees, taxes, and plan rules are not included.

A person switches off a power strip beside the television after use.

Start with a change you can measure

  1. 01
    Standby power

    Switch off idle entertainment and office gear at the power strip.

  2. 02
    Thermostat changes

    Try a small thermostat change and compare energy use across similar-weather days.

  3. 03
    Laundry timing

    Run full loads and use off-peak hours if your rate plan charges less then.

See the practical guide

Check the numbers yourself

Every estimate shows the formula, the rate date, and the source. Change any input to match your home.

  • Public data
  • Visible formulas
  • Editable assumptions

Practical
cost
guides

  1. 01How Much Does It Cost to Run an Air Conditioner Per Hour?Calculate an air conditioner's hourly, daily, and monthly electricity cost from its wattage, runtime, and local electric rate.
  2. 02How Much Does It Cost to Run a Space Heater for 24 Hours?Estimate the daily and monthly cost of a 1,500-watt space heater, then adjust for thermostat cycling and your own electric rate.
  3. 03How Much Electricity Does a Refrigerator Use Per Month?Turn a refrigerator's annual EnergyGuide estimate or measured daily kWh into a realistic monthly electricity cost.