How many watts does a dehumidifier use?
A dehumidifier uses 300–700 W (about 500 W on average). Running 6 hours/day, that is about 3.00 kWh a day and 90.0 kWh a month — roughly $16.48 a month at the U.S. average rate of 18.31 ¢/kWh.
This is the dehumidifier electricity usage reference: watts, amps on a 120 V circuit, the kWh math, and links to what that usage costs in each state.
Watts, amps, and kWh for a dehumidifier
| Measure | Value |
|---|---|
| Rated wattage range | 300–700 W |
| Average draw used in our math | 500 W |
| Amps at 120 V | 2.5–5.8 A (4.2 A at the average draw) |
| kWh per hour | 0.50 kWh |
| kWh per day at 6 hours/day | 3.00 kWh |
| kWh per month | 90.0 kWh |
| Cost per month at the U.S. average (18.31 ¢/kWh) | $16.48 |
The math is kWh = watts × hours ÷ 1000 and amps = watts ÷ volts. A standard 120 V household circuit on a 15 A breaker carries about 1,800 W. For the dollars in your state, open cost to run a dehumidifier in Texas and switch states from there.
Dehumidifier electricity usage profile
| Metric | Value |
|---|---|
| kWh per hour | 0.50 kWh |
| kWh per day (typical) | 3.00 kWh |
| kWh per month (typical) | 90.0 kWh |
| kWh per year (typical) | 1095.0 kWh |
| Low runtime scenario | 3 hours/day |
| High runtime scenario | 9 hours/day |
Connect usage to cost tools
Related appliance usage pages
Source & Method
Source: U.S. Energy Information Administration (EIA) Retail Sales of Electricity. Last dataset period: July 2026. Usage calculations use fixed appliance wattage and runtime assumptions so results stay comparable across pages.
Frequently asked questions
How many watts does a dehumidifier use?
A dehumidifier uses 300–700 W (about 500 W on average). Our usage and cost math uses 500 watts running 6 hours/day.
How many amps does a dehumidifier draw?
On a 120 V circuit, 300–700 W works out to about 2.5–5.8 A; at the 500 W we use in the math that is 4.2 A.
How much electricity does a dehumidifier use per month?
About 90.0 kWh a month at 6 hours/day. Lighter use (3 hours/day) comes to roughly 45.0 kWh and heavier use (9 hours/day) roughly 135.0 kWh.
How much does it cost to run a dehumidifier?
About $16.48 a month at the U.S. average rate of 18.31 ¢/kWh — from roughly $11.45 in Louisiana to $43.20 in Hawaii at the same usage. The state cost-to-run pages price it at every state's rate.