Gallons to Liters converter

How to convert gallons (US) to liters

To convert gallons (US) to liters, use L = gal × 3.78541. For example, 25 gal is 94.6353 L. Type any value in the converter above and the result updates instantly.

The Gallons to Liters formula

The conversion is L = gal × 3.78541. One gallon (US) equals 3.78541 L. This conversion is exact: gallon (US) is defined precisely in terms of liter, so the only rounding is in the digits shown.

Gallons to Liters conversion table

Where gallons (US) and liters are used

US gallons measure fuel, milk and paint in the United States; the UK uses a larger imperial gallon.

Liters measure liquids in most countries: drinks, fuel, milk and bottles.

Worked examples

These examples use the formula above, so you can check the converter or do the same by hand:

• 2 gal = 7.57082 L
• 10 gal = 37.8541 L
• 20 gal = 75.7082 L

Converting gallons (US) to liters in your head

Multiply by 4 and subtract 5 percent: 10 US gallons is about 38 liters (exactly 37.85).

Liters to Gallons reference table

For the opposite direction, these values are handy to have at hand:

Common mistakes to avoid

• A US gallon (3.785 L) is smaller than an imperial UK gallon (4.546 L); check which one a recipe or fuel figure uses.
• US fluid ounces and cups differ from UK and metric ones, so recipes from different countries can differ slightly.

About this converter

The converter accepts whole numbers, decimals and negative values, gives the result as you type, and uses full precision internally, so what you copy is as accurate as it can be. It runs in your browser: nothing you type is sent to a server, it keeps working offline once the page has loaded, and there is nothing to install.

Need the opposite direction? Use the Liters to Gallons converter.