Dehumidifier Size Calculator
Pints per day for a room or whole home.
Enter your values
ⓘ Live results
Results
- Recommended capacity
- 25 pints/day
- Raw requirement
- 20 pints/day
- In litres/day
- 9.5
- Suggested airflow
- 420 CFM circulation
Quick answer
Dehumidifier capacity scales with floor area and how damp the space is, from lightly damp to wet.
pints/day ≈ area x factor for dampness level
How to use the Dehumidifier Size Calculator
- 1Measure the floor area you want to dry.
- 2Pick the dampness level that matches the smell and feel of the space.
- 3Round up to the next standard capacity and allow free airflow around the unit.
Worked example
Using the values the calculator loads with:
Inputs
- Floor area1200 sq ft
- DampnessSlightly damp
Results
- Recommended capacity25 pints/day
- Raw requirement20 pints/day
- In litres/day9.5
- Suggested airflow420 CFM circulation
Frequently asked questions
Basement sizing?
Basements usually fall into moderately or very damp, so size up rather than down.
Whole-house units?
A ducted 70-100 pint unit tied into the return handles most homes.
About this calculator
- Built and reviewed by James Whitfield · How we build and test calculators
- Report an error
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.