Gallons ↔ Liters

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