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Questions worth
running the numbers on.

Each guide starts with an editable formula, explains what changes the result, and points to the public data behind the rate.

Cooling

  1. 01

    How 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.

    5 minute read · Updated 2026-07-16

Heating

  1. 01

    How 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.

    4 minute read · Updated 2026-07-16

Appliance Cost

  1. 01

    How 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.

    5 minute read · Updated 2026-07-16
  2. 02

    How Much Electricity Does a Dehumidifier Use?

    Estimate a dehumidifier's daily and monthly cost while accounting for compressor cycling, humidity settings, and seasonal runtime.

    5 minute read · Updated 2026-07-16

Electric Vehicles

  1. 01

    How Much Does It Cost to Charge an EV at Home?

    Calculate home EV charging cost from miles driven, vehicle efficiency, charging losses, and the electricity price on your utility plan.

    6 minute read · Updated 2026-07-16

Outdoor

  1. 01

    How Much Does a Pool Pump Cost to Run Per Month?

    Estimate monthly pool-pump energy cost and see how motor speed, pump wattage, and filtration hours change the result.

    5 minute read · Updated 2026-07-16

Laundry

  1. 01

    How Much Does an Electric Dryer Cost Per Load?

    Calculate dryer cost per load from average power, cycle length, and electric rate, then see which habits shorten heating time.

    5 minute read · Updated 2026-07-16

Home Basics

  1. 01

    How to Calculate Any Appliance's Electricity Cost

    Use one watts-to-kWh formula to estimate the hourly, daily, monthly, or annual energy cost of a household appliance.

    6 minute read · Updated 2026-07-16
  2. 02

    What Does Cents per kWh Mean on an Electric Bill?

    Understand cents per kilowatt-hour, convert it to dollars, and use the right rate when estimating an appliance's energy cost.

    5 minute read · Updated 2026-07-16
  3. 03

    How to Convert Daily kWh Into a Monthly Electric Cost

    Convert a smart plug, home monitor, or appliance label's daily kWh reading into a monthly and annual dollar estimate.

    4 minute read · Updated 2026-07-16