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Dehumidifier Size Chart by Room Size & Dampness
Use this dehumidifier size chart to compare room square footage, dampness level, and estimated pint capacity before opening the calculator. Use the chart as a quick planning reference, then use Dehumidifier Size Calculator when you need exact numbers for your own inputs.
Chart values
| Room size | Slightly damp | Damp | Very damp | Wet or musty |
|---|---|---|---|---|
| 300 sq ft | 30 pints/day | 35 pints/day | 40 pints/day | 45 pints/day |
| 500 sq ft | 35 pints/day | 40 pints/day | 45 pints/day | 50 pints/day |
| 800 sq ft | 50 pints/day | 55 pints/day | 60 pints/day | 65 pints/day |
| 1,000 sq ft | 50 pints/day | 55 pints/day | 60 pints/day | 65 pints/day |
| 1,500 sq ft | 60 pints/day | 65 pints/day | 70 pints/day | 75 pints/day |
Calculated from the existing dehumidifier size calculator inputs: square feet, ceiling height, dampness level, and room temperature.
How to use this chart
Match the room size row first, then move across to the dampness level that best describes the space. Use the calculator for ceiling height, cool-room, and basement details.
When to use the calculator instead
Use the calculator when your measurements, rates, room conditions, local prices, tank setup, loan terms, or classroom routine do not match the simple chart rows. The calculator lets you adjust the inputs instead of forcing your situation into a rough example.
Examples from this chart
Worked example
A very damp 500 sq ft room at an 8 ft ceiling maps to about 45 pints/day in this chart. If that room is a cool basement, open the calculator and check the low-temperature note before buying.
Limitations and assumptions
Values use the dehumidifier size calculator formula with an 8 ft ceiling and 70 °F room temperature. Dampness adjustments are the same visible options used by the calculator.
Save or share this chart
You can print this page, save the tall image for planning, or link to the page from a blog post, classroom resource, forum answer, or project checklist so readers can open the calculator too.
Chart questions
Chart questions
Is this dehumidifier chart enough to choose a unit?
Use it as a starting point. Use the calculator when the ceiling is taller than 8 ft, the room is below 65 °F, or the space is a basement or laundry room.
Should I round up for a wet basement?
Usually yes. Wet, musty, or cool spaces often need more capacity, continuous drainage, and a unit rated for lower temperatures.