Dehumidifier Running Cost Calculator
Instantly calculate how much it costs to run your dehumidifier per day, week, month, and year based on its wattage and your electricity price.
Calculate Your Running Cost
Enter your dehumidifier’s power rating, how many hours a day you run it, and your electricity price below to get an instant cost breakdown.
Running Cost Calculator
Enter your details to see the estimated electricity cost
Check the label on your unit or the manufacturer’s spec sheet
Actual run time may be less if it cycles off via a humidistat
Check your latest energy bill or tariff for your exact unit rate
Estimated Cost
Calculated from your power usage and tariff
Dehumidifier Running Cost Reference Chart
Estimated daily and monthly running costs for common dehumidifier sizes, based on 8 hours of use per day at an average UK electricity price of 27p per kWh.
| Dehumidifier Type | Typical Wattage | Cost Per Day (8 hrs) | Cost Per Month |
|---|---|---|---|
| Small Desktop / Mini | 20-50 W | £0.04 – £0.11 | £1.30 – £3.24 |
| Compact Room Unit | 150-200 W | £0.32 – £0.43 | £9.73 – £12.97 |
| Standard Domestic Unit | 250-300 W | £0.54 – £0.65 | £16.22 – £19.46 |
| Large / High Capacity | 400-480 W | £0.86 – £1.04 | £25.95 – £31.14 |
| Whole-House Unit | 600-700 W | £1.30 – £1.51 | £38.92 – £45.41 |
Dehumidifier Cost FAQ
Everything you need to know about the electricity cost of running a dehumidifier at home.
Running a typical 200-300 watt dehumidifier for 8 hours a day costs roughly 40-70 pence per day at average UK electricity prices, depending on the exact wattage and your tariff rate.
No, most dehumidifiers use a humidistat to switch off once the target humidity is reached, so continuous running is rarely necessary. It is usually cheaper to run the unit until the room reaches around 50-55% relative humidity, then let it cycle on and off as needed.
Most domestic dehumidifiers use between 150 and 480 watts, depending on their size and extraction capacity. Small desktop units use as little as 20-50 watts, while large whole-house units can use 700 watts or more.
A dehumidifier typically uses less electricity than appliances like tumble dryers or electric heaters, but more than small electronics. Running one for several hours a day is comparable to running a few standard light bulbs continuously.