Result
$29.78 per month
This whole-house dehumidifier costs about $29.78 per month at the entered runtime and electric rate.
- Daily kWh
- 6.12 kWh
- Season cost
- $148.92
More
Common scenarios
Whole-house running-cost checks
These examples change wattage, available runtime, duty cycle, season length, and electricity rate. They estimate electricity only, not installed system cost.
At a glance
- Cost
- Free
- Login
- Not required
- Best use
- Estimate whole-house dehumidifier operating cost from wattage, runtime, compressor duty cycle, season length, and electricity rate.
- Output
- Browser result with print and PDF options
- Reviewed
- 2026-08-31
Result summary
Quick answer
With the sample inputs, this calculator returns $29.78 per month. Daily kWh: 6.12 kWh. Convert system watts to kilowatts, multiply by available hours and the average duty cycle, then apply the entered electricity rate for an average month. Multiply that monthly cost by the entered season length for the seasonal total.
This calculator estimates running cost, not installed cost
The result includes estimated dehumidifier electricity from wattage, available runtime, compressor duty cycle, season length, and kWh rate. It does not include equipment purchase, installation, ductwork, HVAC blower electricity, maintenance, or repairs.
Publisher Published by EverydayCalc Editorial Editorial standards and limitations
Each calculator shows its formula and defines the inputs. Worked examples make the math checkable. The page also names the limits that can change the result.
Last calculation review:
Instructions
How to use this calculator
Open the short walkthrough for choosing and checking inputs.
The calculator converts watts to kilowatts, adjusts for duty cycle and daily runtime, then multiplies by electricity rate.
Page guide
On this page
Jump directly to the part of the calculator you need.
Calculation details
Formula and methodology
See the exact math used to produce the result.
Monthly electricity cost = watts divided by 1,000 multiplied by hours available per day, duty cycle divided by 100, electricity rate, and 30.4167. Season cost = monthly cost multiplied by entered season months.
Before acting
Assumptions to check
Review the real-world details that can change the estimate.
The entered wattage, available hours, and duty cycle must describe the same operating scenario. This models dehumidifier electricity only; installation, ductwork, condensate pumps, HVAC blower energy, maintenance, repairs, and changes in other HVAC use are separate.
More guidance Examples, methodology, and planning checks Open the worked example, review notes, reference tables, and practical next checks.
What to verify before acting
Compare the modeled monthly and seasonal totals with the product's listed or measured power and your bill rate, then rerun the estimate for the hours and duty cycle expected in different parts of the humid season.
When to use this calculator
- Pricing one month of whole-house dehumidifier operation
- Comparing light-use and heavy-use humid-season scenarios
- Checking the electricity portion of a system operating budget
Tips for better estimates
- Keep rated capacity in pints per day separate from electrical watts.
- Use a duty cycle that matches the same season and humidity target as the runtime.
- Model HVAC blower energy separately when it is part of the operating plan.
How this calculator is reviewed
This page is checked for inputs, formulas, examples, assumptions, topic fit, and related links. For this calculator, the review also covers room square footage, dampness level, basement conditions, drainage, continuous-run options, Energy Star considerations, and hygrometer checks.
The sample result is covered by automated tests, and the page links to related calculators and, where available, supporting guides so readers can check the assumptions before acting. If a formula, label, or assumption looks off, send the page URL and your inputs through the contact page.
How this estimate was built
This page multiplies system watts by available daily hours and compressor duty cycle, applies the electricity rate, and scales the result to an average month and entered season length. Equipment, installation, ductwork, HVAC blower electricity, maintenance, and repairs are not included.
Worked example
Example inputs: System wattage: 850 watts; Hours available per day: 16; Average duty cycle: 45 %; Electricity rate: $0.16 /kWh; Season length: 5 months. With those values, the calculator returns $29.78 per month. This whole-house dehumidifier costs about $29.78 per month at the entered runtime and electric rate.
Whole-house dehumidifier running-cost examples
| Light use: 600 W, 12 hr/day, 35% duty, 5 months | $12.26/month and $61.29 per season |
|---|---|
| Default: 850 W, 16 hr/day, 45% duty, 5 months | $29.78/month and $148.92 per season |
| Heavy use: 1,200 W, 20 hr/day, 60% duty, 6 months | $70.08/month and $420.48 per season |
| Not included | Equipment, installation, ductwork, HVAC blower electricity, maintenance, and repairs |
Example scenarios
- Use a product's listed or measured running watts rather than a capacity rating in pints per day.
- Enter the hours the system is available to run, then estimate what share of that time the compressor actually runs.
- Use the kWh rate from the bill you are comparing and set season months to the humid period you want to model.
Quick reference chart
| Sample result | $29.78 per month |
|---|---|
| Daily kWh | 6.12 kWh |
| Season cost | $148.92 |
| Best next step | Compare the modeled monthly and seasonal totals with the product's listed or measured power and your bill rate, then rerun the estimate for the hours and duty cycle expected in different parts of the humid season. |
FAQs
Whole-House Dehumidifier Cost Calculator questions
Does duty cycle mean the system runs continuously?
No. Duty cycle is the share of the entered available hours when the compressor runs. A 45% duty cycle means the calculation prices 45% of those hours.
Does the seasonal cost include equipment and installation?
No. The calculation covers electricity from the entered operating scenario. Equipment, installation, ductwork, drainage work, and service costs are not included.
Why can the actual electricity cost differ?
Actual wattage and compressor runtime can change with weather, moisture load, setpoint, airflow, controls, and the rest of the HVAC system.
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Common planning mistakes
Using a pints-per-day capacity as wattage, pricing all available hours as compressor-on time, applying the season length to a daily cost instead of the monthly result, or treating the electricity estimate as an installed-system price.
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