When shopping for a home or basement dehumidifier, you will immediately notice that units are categorized by pints per day (e.g., 20-pint, 35-pint, 50-pint, or 70-pint). But what does that actually mean in terms of everyday gallons, and how often will you have to empty the water bucket?
In this guide, we break down the exact pint-to-gallon conversions for common dehumidifiers, explain how daily extraction ratings work, and help you choose the right capacity for your space.
💧 Quick Dehumidifier Pints to Gallons Conversion Chart
A dehumidifier’s pint rating indicates the total volume of moisture removed over a continuous 24-hour period under standard testing conditions (Department of Energy testing at 65°F and 60% relative humidity).
| Dehumidifier Rating (Pints/Day) | Daily Water Extracted (US Gallons) | Extraction in Liters | Typical Bucket Size (Gallons) | Daily Emptying Frequency |
|---|---|---|---|---|
| 20 Pints | 2.5 Gallons | 9.46 L | 0.8 – 1.0 Gal | ~2 to 3 times / day |
| 30 Pints | 3.75 Gallons | 14.19 L | 1.0 – 1.5 Gal | ~2 to 3 times / day |
| 35 Pints | 4.375 Gallons | 16.56 L | 1.0 – 1.5 Gal | ~3 times / day |
| 50 Pints | 6.25 Gallons | 23.66 L | 1.5 – 2.0 Gal | ~3 to 4 times / day |
| 70 Pints | 8.75 Gallons | 33.12 L | 1.8 – 2.5 Gal | ~3 to 5 times / day |
Pro Tip: Need to convert a custom dehumidifier capacity? Use our free Dehumidifier Pints to Gallons Tool or the Instant Pints to Gallons Calculator.
🪣 Does a 50-Pint Dehumidifier Have a 50-Pint Bucket?
No! This is one of the most common consumer misconceptions.
A “50-pint” dehumidifier does not hold 50 pints (6.25 gallons) in its internal water tank. If it did, the water bucket alone would weigh over 52 pounds (23.6 kg), making it almost impossible to lift and empty comfortably.
Instead, most standard portable dehumidifiers have a collection bucket that holds between 1.0 and 2.0 gallons (8 to 16 pints).
What This Means For You:
- If your room is very damp and the dehumidifier runs at peak capacity (extracting 50 pints / 6.25 gallons a day), you will need to empty a 1.5-gallon bucket roughly 4 times a day.
- To avoid frequent manual emptying, look for models with a continuous gravity drain hose or a built-in condensate pump.
📏 How to Choose the Right Size Dehumidifier
Choosing the right size depends on two factors: room square footage and moisture level.
1. Moderately Damp (Air feels damp, musty odor in humid weather)
- Up to 1,500 sq. ft.: 20 to 30 pints (2.5 – 3.75 gallons/day)
- 1,500 – 2,500 sq. ft.: 30 to 35 pints (3.75 – 4.37 gallons/day)
- 2,500 – 4,000 sq. ft.: 50 pints (6.25 gallons/day)
2. Very Damp / Wet (Damp spots on walls, condensation on windows, sweating pipes)
- Up to 1,500 sq. ft.: 30 to 35 pints (3.75 – 4.37 gallons/day)
- 1,500 – 2,500 sq. ft.: 50 pints (6.25 gallons/day)
- 2,500 – 4,000 sq. ft.: 70 pints (8.75 gallons/day)
🧮 How to Calculate Pints to Gallons
The mathematical formula to convert any dehumidifier pint rating to gallons is straightforward:
$$\text{US Gallons} = \frac{\text{Pints}}{8}$$
- Example 1: $50 \text{ pints} \div 8 = 6.25 \text{ US gallons}$
- Example 2: $70 \text{ pints} \div 8 = 8.75 \text{ US gallons}$
To look up any other volume or check conversion tables from 1 to 100 pints, visit our Full Pints to Gallons Chart.