US Gallons to Liters Conversion Chart

How to use the chart

Find the US gallon value in the first column and read its liter equivalent in the second column.

For a value not listed, use:

The US Gallons to Liters Converter calculates whole, decimal, fractional, and mixed gallon values.

Fractional US gallons to liters chart

US gallons to liters chart: 1 to 10 gallons

US gallons to liters chart: 12 to 50 gallons

US gallons to liters chart: 55 to 250 gallons

Large-capacity gallon-to-liter chart

Decimal gallon conversion chart

Vehicle fuel tank chart

Aquarium size chart

The chart converts nominal tank capacity. Decorations, substrate, equipment, and headspace can reduce actual water volume.

How chart values are calculated

Each value is multiplied by exactly 3.785411784.

Example: calculate 35 gallons

Example: calculate 125 gallons

Chart accuracy and rounding

The US liquid gallon conversion factor is exact. Most chart results are rounded to two decimal places to keep the tables easy to scan.

The original capacity may itself be rounded. A tank advertised as 100 gallons may represent a nominal product size rather than a laboratory measurement of usable volume.

US liquid gallon chart limitations

This chart applies to US liquid gallons. It does not apply to:

• Imperial gallons;
• US dry gallons;
• gallons per hour;
• miles per gallon;
• price per gallon;
• tank dimensions without a known volume.

Common chart mistakes

Using the nearest listed row

Convert the actual decimal or fractional quantity when precision matters.

Ignoring the gallon definition

Confirm that the source uses US liquid gallons.

Assuming capacity equals usable volume

Tanks and containers may require headspace or contain internal displacement.

Using rounded values for technical work

Use the full conversion factor when the application requires more precision.

Related US gallons to liters guides

Frequently asked questions