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)

Frequently Asked Questions About Dehumidifier Power

How much electricity does a 50-pint dehumidifier use per day?

A typical 50-pint portable dehumidifier draws about 450 to 550 Watts. Running at a 50% duty cycle (12 active hours daily) consumes roughly 6.0 kWh per day, costing approximately $1.10/day or $33.12/month at 18.4¢/kWh.

What is the most energy-efficient humidistat setting for a basement?

The EPA and ENERGY STAR recommend setting basement humidistats between 45% and 50% relative humidity. Setting it below 40% forces the compressor to run nearly continuously without providing additional moisture protection.

Why do ENERGY STAR certified dehumidifiers save so much power?

ENERGY STAR certified dehumidifiers feature higher-efficiency refrigeration coils and improved fan aerodynamics, removing at least 1.9 liters of water per kilowatt-hour (L/kWh) compared to 1.3 L/kWh for standard units, saving 20% to 30% on electric bills.

Does running a dehumidifier lower summer air conditioning costs?

Yes. Dry air feels significantly cooler on the skin than humid air at the same temperature. By keeping indoor relative humidity around 50%, you can comfortably set your air conditioning thermostat 2°F to 3°F higher, offsetting the dehumidifier power cost.

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.

Dehumidifier CostCalculate basement and room dehumidifier electricity costs per day, month, and season based on rated wattage, humidistat duty cycle, and utility rates.
Appliance Electricity UseLearn how appliance wattage, daily runtime, and compressor duty cycles determine kilowatt-hour (kWh) consumption and monthly electricity costs.
Appliance Energy Cost CalculatorEstimate the electricity usage and operating cost of any household appliance based on wattage, usage hours, and duty cycle.
Air Conditioner Cost CalculatorEstimate air conditioner electricity usage (kWh) and operating cost using cooling capacity (BTU/hr), EER efficiency, wattage, and duty cycle.
Space Heater Cost CalculatorEstimate electricity usage (kWh) and operating costs for one or more electric space heaters based on wattage, quantity, runtime, and duty cycle.
Electricity Bill AnalyzerCompare two billing periods, normalize usage by billing days, estimate your all-in cost per kWh, and understand bill changes.
Electricity RatesResidential electricity rate benchmarks and U.S. state averages with EIA source attribution.
MethodologyTransparent formulas, calculation assumptions, and estimate limitations at Energy Bill Lab.