Dehumidifier Electricity Cost Calculator

Calculate monthly and annual electricity costs for basement and room dehumidifiers using compressor wattage, humidistat cycling duty cycle, and local utility electricity rates.

Illustrative Dehumidifier Benchmarks

Estimated Dehumidifier Electricity Cost

Monthly Cost

$14.85

90.0 kWh / month

Annual Cost

$180.68

1095 kWh / year

Daily Cost

$0.50

3.00 kWh / day

Effective Power Draw

250 W

50% duty cycle

Formula: kWh = (Watts × Hours/Day × Duty Cycle %) / 1,000 | Rate used: 16.50¢/kWh

Understanding Dehumidifier Wattage & Humidistat Duty Cycles

Dehumidifiers operate an internal refrigeration compressor and fan to condense airborne moisture. Capacity ratings (such as 35 or 50 pints per day) measure moisture removal performance, whereas electricity bills depend on electrical input wattage (typically 300W to 700W) and compressor cycling.

Dehumidifier Energy Formula:Daily kWh = (Wattage × Connected Hours/Day × Duty Cycle %) ÷ 1,000Monthly Cost ($) = (Daily kWh × 30) × (Rate ¢/kWh ÷ 100)

Factors Affecting Dehumidifier Operating Hours

Basement relative humidity, ambient space temperature, target humidistat setpoint, air filter cleanliness, and direct continuous drainage affect how many hours per day the compressor remains active.

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