Dehumidifier Running Cost Calculator
Estimate dehumidifier electricity use and running cost from unit count, rated power, operating hours, duty cycle and electricity price.
Default project preview
$46.33
Connected power
0.65 kW
Average operating power
0.36 kW
Daily energy use
8.6 kWh
Seasonal energy use
1,544.4 kWh
Calculator
Build the material order
Your order will appear here
Enter the project details and calculate a rounded material estimate.
Input and output guide
What each value means
The labels and units below are part of this calculator’s visible methodology. Replace every default with measurements or product data from the actual project.
Number of dehumidifiers
Enter this project assumption in a unitless value. The current imperial default is 1. Minimum: 1.
Rated power per unit
Enter this project assumption in W. The current imperial default is 650 W.
Available operating hours per day
Enter this project assumption in hr. The current imperial default is 24 hr. Maximum: 24.
Average compressor duty cycle
Enter this project assumption in %. The current imperial default is 55 %. Minimum: 1. Maximum: 100.
Operating days per month
Enter this project assumption in days. The current imperial default is 30 days. Maximum: 31.
Months in operating season
Enter this project assumption in months. The current imperial default is 6 months. Maximum: 12.
Electricity price
Enter this project assumption in per kWh. The current imperial default is 0.18 per kWh. Minimum: 0.
How to read the outputs
Connected power
1 unit. Default preview: 0.65 kW.
Average operating power
55% duty cycle. Default preview: 0.36 kW.
Daily energy use
24 available hours. Default preview: 8.6 kWh.
Seasonal energy use
6 months. Default preview: 1,544.4 kWh.
Seasonal running cost
entered operating season. Default preview: $277.99.
Electricity price
per kWh. Default preview: $0.18.
Methodology
Transparent calculation
BuildMeter converts every input to a consistent internal unit, applies the selected allowance, and rounds products up to whole purchasable units.
Connected power = unit count × rated watts. Average power applies the duty cycle. Energy = average power × operating time. Cost = kilowatt-hours × electricity price.
Reviewed project guidance
How to use this estimate in a real project
Last reviewed: July 30, 2026
Use the Dehumidifier Running Cost Calculator to estimate a planning quantity from verified rated wattage, duty cycle, runtime and electricity tariff. It supports scope comparison, purchasing and operating-cost planning, but it does not select equipment, approve code compliance or replace project-specific design.
Calculation steps
- 1Measure or obtain each design input from the actual project and keep one consistent unit system.
- 2Enter rated wattage, duty cycle, runtime and electricity tariff using product data or approved design information rather than generic nominal values.
- 3Review the unrounded engineering or usage result before applying allowances, duty cycle, efficiency or tariff assumptions.
- 4Apply each adjustment once, then round only the final purchasing, equipment-count or scheduling output.
Worked numerical example
A 500 W dehumidifier operating 10 hours at a 55% duty cycle uses 2.75 kWh; at $0.20/kWh the estimated daily energy cost is $0.55.
Purchasing and rounding
Build the replacement budget from the number of units and the entered per-window cost basis, then separate options such as upgraded glazing, trim reconstruction, structural repair, disposal and permits when those are outside the base price.
Interpret the result
The result is a planning total for the unit count and price assumption entered. Actual replacement projects vary by window size, operating type, frame material and opening condition, so a single average unit price should be replaced with quoted unit groups when accuracy matters.
Page-specific assumptions
- Inputs describe the actual connected system or measured project scope.
- One operating condition, product rating and unit system are used per calculation.
- Allowances and efficiency losses are not already embedded in the entered values.
- Code, health, structural, electrical and hydraulic requirements are verified independently.
Common mistakes
- Using nominal equipment ratings instead of delivered performance at design conditions.
- Mixing instantaneous flow or power with daily or annual energy.
- Applying the same allowance more than once.
- Treating a quantity or cost estimate as equipment selection or professional approval.
Primary and technical references
BuildMeter provides planning estimates, not engineering, architectural, electrical, mechanical, plumbing, permit or code approval. Review the methodology and verify final decisions with product documentation and qualified professionals.
BuildMeter Guides
Understand the measurements and assumptions
Use these visible reference guides before changing project inputs or planning allowances.
FAQ
Dehumidifier Running Cost Calculator questions
What does duty cycle mean?+
It is the percentage of available time that the compressor and main load operate, rather than only the circulation fan.
Why might a larger unit cost less to run?+
A properly sized unit may remove moisture faster and operate at a lower duty cycle, though rated power and real conditions determine the result.
How can actual power be measured?+
A plug-in energy meter can record kilowatt-hours over several representative days.