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Gallon (US) to Liter

gal
Liter (L)
L

L = gal × 3.78541

Quick Reference: Gallon (US) to Liter

galL
13.7854
518.9271
1037.8541
2594.6353
50189.2706
100378.5412

How to Convert Gallon (US) to Liter

Formula:

L = gal × 3.78541

Example:

5 gal = 18.9271 L

  1. Enter the value in Gallon (US) you want to convert
  2. The result is calculated automatically
  3. Copy your result in Liter or continue converting

About Gallon (US) and Liter

Converting gallons to liters is essential when working with American recipes, fuel economy figures, or product specifications in metric countries. One US gallon equals exactly 3.785411784 liters.

Common Uses for This Conversion

Converting American fuel economy (MPG) to international standards, scaling recipes, understanding aquarium and pool sizes, and industrial liquid measurement conversions.

💡Did You Know?

The US stuck with the Queen Anne wine gallon (231 cubic inches) after independence, while Britain adopted a new imperial gallon in 1824. This created the lasting difference between US and UK gallons.

Frequently Asked Questions

1 US gallon = exactly 3.785 liters (3.785411784 L). The UK (imperial) gallon is larger at 4.546 liters. Most US recipes, fuel prices, and pool measurements use the US gallon. To convert US gallons to liters, multiply by 3.785.
5 US gallons = 18.93 liters. This is the standard size of a water cooler jug and a portable gas can. A 5-gallon bucket — ubiquitous in US home improvement stores — holds exactly 18.93 liters of water, which weighs about 18.93 kg.
10 US gallons = 37.85 liters. A typical small car fuel tank holds 40–50 liters (about 10–13 US gallons). If a US car gets 30 mpg on a 10-gallon fill-up, it can travel about 480 km — that's roughly 12.6 L/100km for a metric comparison.
The US gallon (3.785 L) and the UK imperial gallon (4.546 L) differ by about 20% — the UK gallon is larger. This matters most for fuel economy: a car rated 30 mpg in the US would be rated about 36 mpg (imperial) in the UK for the same vehicle. Fuel prices listed in 'per gallon' in different countries are never directly comparable.

Related Conversions

Liter → Gallon (US)Milliliter → Fluid Ounce (US)Fluid Ounce (US) → MilliliterCup (US) → MilliliterLiter → Quart (US)Pint (US) → Liter

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