Gallons to Liters Converter Formula

Understand the math behind the gallons to liters converter. Each variable explained with a worked example.

Use the Gallons to Liters Converter

Formulas Used

Liters

liters = gallons * 3.78541

Milliliters

ml = gallons * 3785.41

Quarts

quarts = gallons * 4

Variables

VariableDescriptionDefault
gallonsGallons(gal)1

How It Works

How to Convert Gallons to Liters

Formula

Liters = Gallons x 3.78541

One US gallon equals exactly 3.785411784 liters.

Quick Reference

  • 1 gallon = 3.785 L = 4 quarts = 8 pints = 16 cups
  • 0.264 gallons = 1 liter

    • Worked Example

    Convert 1 gallon of water to liters.

    gallons = 1
    1. 01Use the conversion: 1 gallon = 3.78541 L.
    2. 02Multiply: 1 x 3.78541 = 3.78541 L.
    3. 031 gallon is approximately 3.785 liters.

    Frequently Asked Questions

    How many liters in a gallon?

    One US gallon equals approximately 3.785 liters.

    What is the difference between US and imperial gallons?

    A US gallon is 3.785 L while an imperial gallon is 4.546 L. The imperial gallon is about 20% larger.

    How many cups in a gallon?

    There are 16 US cups in 1 US gallon.

    Ready to run the numbers?

    Open Gallons to Liters Converter