What does it actually cost to run?
KwhWise turns official U.S. energy data into running-cost numbers you can use: per hour, per month and per year, at your state's electricity price.
Latest data: the average U.S. residential electricity price was 18.31¢ per kWh in July 2026, up 4.9% from July 2025 (U.S. EIA, released September 24, 2026). See every state →
Calculators
Calculator
Appliance Electricity Cost Calculator (by State)Enter watts and hours of use to see what any appliance costs per day, month and year at your state's latest average electricity price (EIA data).Lookup
Dehumidifier Running Cost Lookup: Every ENERGY STAR ModelYearly electricity cost of every ENERGY STAR certified dehumidifier at your state's price, loaded live from the EPA's ENERGY STAR database.
Appliance Electricity Cost Calculator (by State)Enter watts and hours of use to see what any appliance costs per day, month and year at your state's latest average electricity price (EIA data).Lookup
Dehumidifier Running Cost Lookup: Every ENERGY STAR ModelYearly electricity cost of every ENERGY STAR certified dehumidifier at your state's price, loaded live from the EPA's ENERGY STAR database.
Guides
Data
Electricity Prices by State (July 2026 EIA Data)Average residential electricity price in every U.S. state for July 2026, with the change from a year earlier. Official EIA data, ranked, updated monthly.Heating
How Much Does a Space Heater Cost to Run? (Every State)A 1,500-watt space heater costs about $0.27 an hour at the U.S. average electricity price. See the per-hour, daily and monthly cost in every state.Appliances
What Does a Dehumidifier Cost to Run? Data From 552 ModelsWe analyzed every ENERGY STAR certified dehumidifier: median yearly energy use by size, what it costs at U.S. prices, and how to pick an efficient one.Basics
How to Calculate What an Appliance Costs to RunThe simple formula for appliance electricity cost (watts × hours ÷ 1,000 × rate), worked examples, and how to find your real price per kWh on your bill.
Electricity Prices by State (July 2026 EIA Data)Average residential electricity price in every U.S. state for July 2026, with the change from a year earlier. Official EIA data, ranked, updated monthly.Heating
How Much Does a Space Heater Cost to Run? (Every State)A 1,500-watt space heater costs about $0.27 an hour at the U.S. average electricity price. See the per-hour, daily and monthly cost in every state.Appliances
What Does a Dehumidifier Cost to Run? Data From 552 ModelsWe analyzed every ENERGY STAR certified dehumidifier: median yearly energy use by size, what it costs at U.S. prices, and how to pick an efficient one.Basics
How to Calculate What an Appliance Costs to RunThe simple formula for appliance electricity cost (watts × hours ÷ 1,000 × rate), worked examples, and how to find your real price per kWh on your bill.
Why trust these numbers?
We do not test products in a lab and we don't pretend to. Every estimate on this site comes from a public, official source that you can check yourself, mainly the U.S. Energy Information Administration for prices and the ENERGY STAR certified-product data for appliance energy use. Each page links its sources and shows the formula. Read our methodology.