Gallons and Liters Conversion Guide
Swimming pool chemicals, equipment, and manuals are published in both U.S. customary units and metric units depending on where they were manufactured. This calculator quickly converts U.S. gallons into liters and liters back into U.S. gallons using standard conversion factors.
Why This Conversion Matters
Many pool owners measure pool volume in gallons while manufacturers in other countries often use liters. Knowing both units helps you follow chemical instructions accurately and compare equipment specifications without confusion.
Gallons to Liters
One U.S. gallon equals approximately 3.78541 liters.
- 10 gallons = 37.85 liters
- 100 gallons = 378.54 liters
- 18,000 gallons = 68,137 liters
Liters to Gallons
To convert liters back into U.S. gallons, divide liters by 3.78541.
- 100 liters = 26.42 gallons
- 500 liters = 132.09 gallons
- 10,000 liters = 2,641.72 gallons
Common Pool Uses
- Converting chemical dosage recommendations
- Reading international pool manuals
- Sizing replacement equipment
- Comparing pool specifications
- Understanding metric product labels
Important Notes
- This calculator converts U.S. gallons only, not Imperial (UK) gallons.
- 1 U.S. gallon = 3.78541 liters.
- 1 liter = 0.26417 U.S. gallons.
- Small rounding differences are normal and acceptable for routine pool calculations.