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How much does it cost to run a dehumidifier?

A typical dehumidifier uses 315–628 kilowatt-hours (kWh) a year, depending on its type. That’s about 36–72 watts on average.

What do you run?

Tap a row to edit it.

  • Type
    kWh a year
    How manyHow many

    315 kWh a year ÷ 12 = 26.3 kWh · 26.3 kWh × 18.0¢ US average = $4.73 a month

    A kilowatt-hour (kWh) is 1,000 watts for one hour. It’s what your bill counts.

$5a month

$5 a month

About $57 a year, or 15.5¢ a day.

Estimate my billSee prices by state

How much power does each kind of dehumidifier use?

A whole-home dehumidifier uses about 2 times as much as a portable one.

  • Portable0.863 kWh a day · 36 W on average$4.73
  • Whole-home1.72 kWh a day · 72 W on average$9.41

ENERGY STAR · certified models · pulled Nov 3, 2026

Each row is the middle (median) ENERGY STAR model of its type.

What does a dehumidifier cost to run in each state?

The same dehumidifier costs more than three times as much in Hawaii as in North Dakota.

  1. Hawaii$11.65 · 44.3¢
  2. California$8.49 · 32.3¢
  3. Massachusetts$8.00 · 30.4¢
  4. Maine$7.78 · 29.6¢
  5. Rhode Island$7.73 · 29.4¢
  6. US average$4.73 · 18.0¢
  7. Idaho$3.37 · 12.8¢
  8. Nebraska$3.34 · 12.7¢
  9. North Dakota$3.23 · 12.3¢
See prices by state

A portable dehumidifier (315 kWh a year) at each state’s average price.

State averages · last 12 months · US government data (EIA)

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FAQ

Questions about dehumidifier power

The middle ENERGY STAR portable dehumidifier uses about 315 kilowatt-hours (kWh) a year, or 0.863 kWh a day. Across types, the middle models use 315–628 kWh a year.

Information as of Nov 2, 2026.

Our numbers come from US government data (EIA) and ENERGY STAR.

Dehumidifier figures: ENERGY STAR Certified Dehumidifiers (opens data.energystar.gov in a new tab) (pulled Nov 3, 2026).

Report a mistake (opens support.onepublicgrid.com in a new tab)