How Much Electricity Does a Dehumidifier Use?

How Much Electricity Does a Dehumidifier Use?

Many people are worried about running their dehumidifier 24/7, as in the past it could be very costly due to energy inefficiencies. So, how much electricity does a dehumidifier use? Is it better now in 2020 then years ago? How can I find an energy efficient dehumidifier? Let’s discuss.

How to Calculate How Much Electricity a Dehumidifier Uses

You need to know 3 things in order to calculate the cost of any dehumidifier. Those three things are the following:

  1. Wattage of your Dehumidifier
  2. kWh Cost from your Electric Company
  3. How Many Hours Per Day it Runs

As an example, I’ll use the data from my personal favorite high-efficiency dehumidifier of 2020, the LG PuriCare 70 Pint Dehumidifier. This thing is a monster, and can dehumidify anything, which is why it pulls 545 Watts.

Next we need to figure out the kWh Cost. This depends on not only where you live, but also who your electric company is. I’m going to, just as an example, use the current rate from Duke Energy for Florida. Their rate currently is 7.7 cents per kWh for the first 1000 kWh, and 9.4 cents per kWh for everything after that. Just for simplicity, we’ll use the 9.4 cents/kWh number. Your local electric company’s rates can vary wildly, so don’t assume this number will work for you as well (Unless you live in Florida, in which case, we recommend our Florida Guide to Dehumidifiers).

Finally, we need to figure out how often it runs a day. Even if you think you’re running your dehumidifier 24/7, you probably actually aren’t. Most modern dehumidifiers with automatically shut off their compressor once they hit the target humidity. The only exception to this is if your dehumidifier is under-powered, and can never hit its humidity target. A safe estimate is that a dehumidifier whose fan is on draws about 50 Watts.

Let’s Calculate The Energy Cost Per Month

First, we need to turn Watts into Kilowatts. We can do this by dividing it by 1000. That means that 545 Watts is .545 Kilowatts.

Second, we multiply our electric company’s kWh price by our Kilowatt calculation. That gives us $0.05123. That’s the cost per hour of it running at full power (which it won’t run at 24/7).

Finally, we figure out how long it actually runs for. In the most humid of rooms, it’s a very conservative estimate to say 12 hours of full power a day. That would give us $0.61 for those 12 hours at full power. Assuming the other 12 hours are running at 50 Watts, that gives us $0.06 additionally. Bringing us to the grand total of $0.67/day or $20/month for a high efficiency system.

How to Find Energy Efficient Dehumidifiers

There’s one easy trick to finding Energy Efficient Dehumidifiers — Look for the “Energy Star” logo! For example, Black and Decker’s affordable dehumidifiers generally all have Energy Star certifications. An Energy Star Certification means that Energy Star, which is a part of the United States Federal Government, has certified that it draws a minimal amount of power. It’s a great way to quickly tell if something is soft on your electric bill without having to do nasty math.

How Much Electricity Does a Dehumidifier Use?

BLACK+DECKER 50 Pint Energy Star Dehumidifier


  • Energy Efficient
  • Highly Effective 50 Pint DOE
  • Small Size, and Portable


  • If you need a dehumidifier with a pump, this one, even though it has a pump option, falls short

Our Opinion:

It’s an above average dehumidifier, and with its reasonable price and trusted brand, it’s a great choice to make and hard to go wrong.

Hopefully this post has helped you. Feel free to leave a comment below if you have any additional questions, and our experts would be glad to answer them, and even can provide recommendations. Also be sure to check out our full list of recommendations on our homepage, here.

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