Watts to kWh
kWh = (W Γ· 1,000) Γ hours Γ load factor. Multiply kWh by your electricity price to estimate energy cost.
π§ Worked example
How much electricity does a dehumidifier use?
Start with a transparent example, then replace the assumptions with your own wattage, operating time and electricity price.
1.44 kWhper day of use
8.64 β¬per month at 0.20 β¬/kWh
Worked example
300 W Γ 8 h/day Γ 60 % load factor Γ 30 days.
43.20 kWh/month Β· 103.68 β¬/year
This is an energy-only estimate. Your bill can also include standing charges, taxes and other household consumption.
Typical reference range
Use the label, manual or manufacturer data for your exact model whenever possible.
| Type or situation | Indicative reference |
|---|---|
| Small compressor unit | 180β300 W |
| Typical domestic unit | 250β450 W |
| Large / high-capacity unit | 400β700+ W |
What changes the result?
Rated watts are only one part of the calculation.
Measure when possible
Thermostats, compressors, inverter control and programmes can make real consumption lower or higher than a simple maximum-power estimate.
Practical checks
- Use a realistic humidity target rather than forcing the unit to run continuously.
- Close windows and doors while dehumidifying a room.
- Clean filters and check water drainage.
Compare more appliances
Return to the appliance library or use the general electricity calculator for any device.
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