How Much Electricity Does A Dehumidifier Use?
A dehumidifier typically uses about 400 watts while running. At 10 hours a day that is 2 kWh per day, 60 kWh per month and 730 kWh per year (assuming it draws full power about 50% of the time).
Calculate your own cost
- Per hour
- $0.0350.2 kWh
- Per day
- $0.352 kWh
- Per week
- $2.4514 kWh
- Per month (30 days)
- $10.5060 kWh
- Per year
- $127.75730 kWh
Formula: watts ÷ 1,000 × hours × rate. Edit any box and every number updates instantly.
People also ask
How much does a 400-watt dehumidifier cost per hour?
At $0.175/kWh, it costs $0.035 per hour. The maths: 400 W ÷ 1,000 = 0.4 kWh per hour, × $0.175 = $0.07. This page assumes it draws full power about 50% of the time, so the hourly figure shown is lower.
How much does it cost per month?
Used 10 hours a day for 30 days, it costs about $10.50 per month and uses 60 kWh. Change the hours in the calculator above to match how you use it.
How many kWh does it use?
2 kWh per day, 60 kWh per month and 730 kWh per year at 10 hours a day. A kWh is one kilowatt (1,000 W) used for one hour. It is the unit on your electricity bill.
How can I lower the cost?
Set the target to 45 to 50% humidity. Lower than that wastes electricity. Check your bill for the exact rate and enter it above.
Does my electricity rate change the answer?
Yes, a lot. At 10¢ per kWh the monthly cost is $6.00 and at 30¢ it is $18.00. Find your rate on your bill (total cost ÷ kWh used) and type it into the calculator.
Cost by hours of use
| Used per day | Energy per day | Cost per day | Cost per month | Cost per year |
|---|---|---|---|---|
| 1 hour | 0.2 kWh | $0.035 | $1.05 | $12.78 |
| 2 hours | 0.4 kWh | $0.07 | $2.10 | $25.55 |
| 3 hours | 0.6 kWh | $0.105 | $3.15 | $38.33 |
| 4 hours | 0.8 kWh | $0.14 | $4.20 | $51.10 |
| 5 hours | 1 kWh | $0.175 | $5.25 | $63.88 |
| 6 hours | 1.2 kWh | $0.21 | $6.30 | $76.65 |
| 7 hours | 1.4 kWh | $0.245 | $7.35 | $89.43 |
| 8 hours | 1.6 kWh | $0.28 | $8.40 | $102.20 |
| 9 hours | 1.8 kWh | $0.315 | $9.45 | $114.98 |
| 10 hours | 2 kWh | $0.35 | $10.50 | $127.75 |
| 11 hours | 2.2 kWh | $0.385 | $11.55 | $140.53 |
| 12 hours | 2.4 kWh | $0.42 | $12.60 | $153.30 |
| 13 hours | 2.6 kWh | $0.455 | $13.65 | $166.08 |
| 14 hours | 2.8 kWh | $0.49 | $14.70 | $178.85 |
| 15 hours | 3 kWh | $0.525 | $15.75 | $191.63 |
| 16 hours | 3.2 kWh | $0.56 | $16.80 | $204.40 |
| 17 hours | 3.4 kWh | $0.595 | $17.85 | $217.18 |
| 18 hours | 3.6 kWh | $0.63 | $18.90 | $229.95 |
| 19 hours | 3.8 kWh | $0.665 | $19.95 | $242.73 |
| 20 hours | 4 kWh | $0.70 | $21.00 | $255.50 |
| 21 hours | 4.2 kWh | $0.735 | $22.05 | $268.28 |
| 22 hours | 4.4 kWh | $0.77 | $23.10 | $281.05 |
| 23 hours | 4.6 kWh | $0.805 | $24.15 | $293.83 |
| 24 hours | 4.8 kWh | $0.84 | $25.20 | $306.60 |
How we worked it out
- Energy per hour: 400 W ÷ 1,000 = 0.4 kWh, × 50% of the time at full power = 0.2 kWh
- Cost per hour: 0.2 kWh × $0.175 = $0.035
- Cost per day: × 10 hours = $0.35
- Month and year: × 30 days = $10.50, × 365 days = $127.75
About dehumidifier running costs
A dehumidifier cycles on and off with a humidistat, so real running time is well under 24 hours.
Typical sizes: 250 W, 400 W, 500 W, 700 W.
How to spend less: Set the target to 45 to 50% humidity. Lower than that wastes electricity.
What this estimate assumes
- The appliance draws full power about 50% of the time, because it cycles on and off.
- Wattage is the typical label value, not a measured value. Check the label on your own appliance.
- The rate is an approximate residential average. Your bill may include fixed fees, tiers or time-of-use pricing. Edit the rate above.
- A month is 30 days and a year is 365 days.