Updated August 15, 2026 · WattCostLab Calculator
Dehumidifier Electricity Cost Calculator
Dehumidifiers cycle as humidity changes, so annual or measured kWh is often a better input than multiplying nameplate watts by 24 hours.
Monthly kWh—
Monthly cost—
Annual cost—
Daily average—
Replace the example with annual kWh from product information or measured energy use.
Why annual kWh is useful
Humidity, temperature, capacity, fan operation and thermostat/humidistat cycling make instantaneous watts a weak predictor of annual use. ENERGY STAR efficiency metrics for dehumidifiers are based on moisture removal relative to electricity consumption.
What changes dehumidifier energy use?
- Indoor humidity target.
- Moisture load and air leakage.
- Basement or room temperature.
- Unit sizing and efficiency.
- Drainage and filter condition.
- Portable versus whole-home operation.
Related tools
Appliance Electricity Cost Calculator and Energy-Efficiency Home Improvements.
Efficiency note: ENERGY STAR describes dehumidifier efficiency using liters of water removed per kWh under standardized testing. See Sources & Data.