How Much Does A Small Dehumidifier Cost to Run in Washington?
A small dehumidifier typically uses 250 watts. At 8 hours a day, drawing full power about 50% of the time, and $0.115/kWh in Washington, it costs about $0.115 per day, $3.45 per month and $41.98 per year.
Calculate your own cost
- Per hour
- $0.0140.13 kWh
- Per day
- $0.1151 kWh
- Per week
- $0.8057 kWh
- Per month (30 days)
- $3.4530 kWh
- Per year
- $41.98365 kWh
Formula: watts ÷ 1,000 × hours × rate. Edit any box and every number updates instantly.
People also ask
How much does a 250-watt small dehumidifier cost per hour?
At $0.115/kWh, it costs $0.014 per hour. The maths: 250 W ÷ 1,000 = 0.25 kWh per hour, × $0.115 = $0.029. 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 8 hours a day for 30 days, it costs about $3.45 per month and uses 30 kWh. Change the hours in the calculator above to match how you use it.
How many kWh does it use?
1 kWh per day, 30 kWh per month and 365 kWh per year at 8 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?
Close windows while running and clean the filter to improve performance. 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 $3.00 and at 30¢ it is $9.00. Find your rate on your bill (total cost ÷ kWh used) and type it into the calculator.
Cost by hours of use in Washington
| Used per day | Energy per day | Cost per day | Cost per month | Cost per year |
|---|---|---|---|---|
| 1 hour | 0.13 kWh | $0.014 | $0.431 | $5.25 |
| 2 hours | 0.25 kWh | $0.029 | $0.863 | $10.49 |
| 3 hours | 0.38 kWh | $0.043 | $1.29 | $15.74 |
| 4 hours | 0.5 kWh | $0.058 | $1.73 | $20.99 |
| 5 hours | 0.63 kWh | $0.072 | $2.16 | $26.23 |
| 6 hours | 0.75 kWh | $0.086 | $2.59 | $31.48 |
| 7 hours | 0.88 kWh | $0.101 | $3.02 | $36.73 |
| 8 hours | 1 kWh | $0.115 | $3.45 | $41.98 |
| 9 hours | 1.13 kWh | $0.129 | $3.88 | $47.22 |
| 10 hours | 1.25 kWh | $0.144 | $4.31 | $52.47 |
| 11 hours | 1.38 kWh | $0.158 | $4.74 | $57.72 |
| 12 hours | 1.5 kWh | $0.173 | $5.18 | $62.96 |
| 13 hours | 1.63 kWh | $0.187 | $5.61 | $68.21 |
| 14 hours | 1.75 kWh | $0.201 | $6.04 | $73.46 |
| 15 hours | 1.88 kWh | $0.216 | $6.47 | $78.70 |
| 16 hours | 2 kWh | $0.23 | $6.90 | $83.95 |
| 17 hours | 2.13 kWh | $0.244 | $7.33 | $89.20 |
| 18 hours | 2.25 kWh | $0.259 | $7.76 | $94.44 |
| 19 hours | 2.38 kWh | $0.273 | $8.19 | $99.69 |
| 20 hours | 2.5 kWh | $0.288 | $8.63 | $104.94 |
| 21 hours | 2.63 kWh | $0.302 | $9.06 | $110.18 |
| 22 hours | 2.75 kWh | $0.316 | $9.49 | $115.43 |
| 23 hours | 2.88 kWh | $0.331 | $9.92 | $120.68 |
| 24 hours | 3 kWh | $0.345 | $10.35 | $125.93 |
How we worked it out
- Energy per hour: 250 W ÷ 1,000 = 0.25 kWh, × 50% of the time at full power = 0.13 kWh
- Cost per hour: 0.13 kWh × $0.115 = $0.014
- Cost per day: × 8 hours = $0.115
- Month and year: × 30 days = $3.45, × 365 days = $41.98
Washington electricity prices
Washington pays about $0.115 per kWh, which is 34% lower than the US average of $0.175. The same small dehumidifier would cost $5.25 a month at the national average.
What it costs in different places
Same 250-watt small dehumidifier, 8 hours a day. Only the local electricity rate changes.
| Place | Rate per kWh | Cost per month |
|---|---|---|
| United States | $0.175 | $5.25 |
| California | $0.32 | $9.60 |
| Texas | $0.155 | $4.65 |
| New York | $0.25 | $7.50 |
| Florida | $0.155 | $4.65 |
| Illinois | $0.17 | $5.10 |
| Pennsylvania | $0.18 | $5.40 |
| Ohio | $0.17 | $5.10 |
| Washington | $0.115 | $3.45 |
About small dehumidifier running costs
Small dehumidifiers cycle with humidity and room conditions. Their average power depends on compressor efficiency and how damp the space is.
Typical sizes: 150 W, 250 W, 350 W, 500 W.
How to spend less: Close windows while running and clean the filter to improve performance.
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 in Washington. 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.