All tools

What does your water heater cost to run?

And what a heat pump water heater would save. Free, about 2 minutes, no sign-up.

What's your ZIP code?

For your local weather and electric rates.

How it works
  • Your weather. 30 years of NOAA records from the station nearest your ZIP. Colder water and air take more energy.
  • Your electric plan, hour by hour. Peak and off-peak prices from the national rate database (OpenEI). Gas at your state’s average price (EIA).
  • Measured, not guessed. Based on a real 65-gallon heat pump water heater, metered every 15 minutes for a year.