How many US gallons are in one liter?

One liter equals exactly 0.264172052358 US liquid gallons. Equivalently, one US gallon equals exactly 3.785411784 liters.

Is the US gallon the same as the UK (imperial) gallon?

No. The US liquid gallon is about 17% smaller. 1 US gallon = 3.785 L, while 1 UK imperial gallon = 4.546 L. This tool uses the US gallon only.

Why does the conversion factor have so many decimal places?

The US gallon is defined as exactly 231 cubic inches, and the liter is defined via the meter. Working through those definitions produces 0.264172052358 gal/L. Rounding is fine for most uses, but the full value is available here.

Can I convert US gallons back to liters?

Multiply the US gallon value by 3.785411784 to get liters. For example, 5 US gal × 3.785411784 = 18.927 L.

Does this handle large volumes like thousands of liters?

Yes. The tool works for any positive number and formats the result to six significant figures, which handles everything from milliliter-scale to industrial tank volumes.

Liters to US Gallons Converter

Enter a volume in liters and get the exact equivalent in US liquid gallons instantly.

Enter Volume in Liters

Liters (L)

Quick presets

Formula: US gal = L × 0.264172 · 1 US gal = 3.785412 L

US Gallons Result

Enter a value in liters to see the US gallons equivalent

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Summary

This tool converts any volume in liters to US liquid gallons using the exact conversion factor of 1 liter = 0.264172052358 US gallons (defined by the international yard and pound agreement). Results update instantly as you type. Use the quick presets for common volumes like 1, 5, 10, 20, or 50 liters.

How it works

Enter a volume in liters in the input field.
The tool multiplies the value by 0.264172052358 to get US liquid gallons.
The result updates instantly as you type.
Click a preset button to load a common volume.
Use the Copy button to copy the result to your clipboard.
Press the clear button or delete the input to reset.

Use cases

Convert fuel tank sizes from liters to US gallons for American vehicles.
Translate European beverage container volumes to US gallons.
Calculate aquarium capacities when buying US-spec equipment.
Convert irrigation or water-usage figures for US-market reports.
Verify product capacities listed in metric for US distribution.
Quick reference when buying bulk liquids priced per US gallon.

Frequently Asked Questions

Last updated: 2026-10-05 · Reviewed by Nham Vu