How to Size a Dehumidifier (Pints for Sq Ft)

Dehumidifier Sizing Calculator

Calculate how many pints you need to dry your room, home, office, or basement.

3. Best Dehumidifier For You This is the best value dehumidifier matching your dehumidifying needs with free shipping.

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Tom built the dehumidifier calculator and sells thousands of dehumidifiers every year.

What Size Dehumidifier Do I Need?

The Dehumidifier Size Calculator answers how many pints of capacity you require to dry your basement, bedroom, or home.

For example, you can select a 900 square foot room size, or a room type, like 'large basement', 'small office' or '2 bedrooms'. Then specify damp, really damp, wet, or extremely wet, and the calculator instantly displays how many pints you need, and recommends a properly sized dehumidifier for your basement.

Frequently Asked Questions

Is there any downside to ordering a size larger than necessary?

No, I usually recommend a 70-pint dehumidifier over a 50-pint or 30-pint, because it costs just $10 more, the Energy Star rating means it will use less electricity. If you set the desired humidity level, it will power on and off as needed.

Does the FAD704DWD unit have a built-in pump for uphill water disposal?

It doesn't go uphill, but you can get a hose and run it downhill from the unit.

For Dehumidifier reviews, visit


"Great calculator you built!" -JoAnne, August 2013

"You are terrific. Thanks SO much for your information." -Alan, June 2013

Which Dehumidifier
Helping people find the right size dehumidifiers since 2008.
2608 Erwin Rd #148
Durham, NC 27705
(919) 383-1400

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