Gallons to Liters Converter

🔒 Runs in your browser — nothing is sent to a server

Convert US gallons to liters at the exact factor 1 US gallon = 3.785411784 L. By default this converter assumes US gallons (the dominant search intent worldwide). For UK imperial gallons (4.546 L) use the dedicated UK Gallons to Liters page — they are about 20 % larger and used in British fuel-economy figures and historical recipes. Browser-local conversion, no upload.

Gallon (US)
Liter (L)

Gallon (US) → Liter (L)

Quick reference table

Gallon (US)Liter (L)
1 gal (US)3.7854 L
2 gal (US)7.5708 L
5 gal (US)18.9271 L
10 gal (US)37.8541 L
25 gal (US)94.6353 L
50 gal (US)189.2706 L
100 gal (US)378.5412 L

Glossary

US gallon

A US liquid gallon is exactly 231 cubic inches, or 3.785411784 L. It is the everyday US unit for fuel, milk, paint and bulk household liquids. One US gallon contains 4 quarts, 8 pints or 128 US fluid ounces. The UK imperial gallon (≈4.546 L) is about 20 % larger and is a different unit — always check which is meant.

Liter (L)

A liter is the standard metric unit of volume, equal to 1 cubic decimeter (1 L = 1000 ml = 0.001 m³). It is used worldwide for beverages, fuel sold in metric markets, kitchen recipes and small-scale chemistry. One US gallon holds about 3.785 L; one UK imperial gallon holds about 4.546 L. The symbol is "L" or "l" (capital L preferred to avoid confusion with the digit 1).

Metric / SI volume

In the metric system, volume is reported in liters (everyday) or cubic meters (industrial), with millilters for fine resolution. The relations are exact powers of ten: 1 m³ = 1,000 L = 1,000,000 ml, and 1 ml = 1 cm³. The metric system is the standard worldwide for science, beverages, fuel in metric countries, and most modern recipes outside the United States.

Imperial / US Customary volume

US customary and UK imperial systems both use gallon, quart, pint and fluid ounce — but with different sizes. The US gallon is 3.785 L (128 US fl oz); the UK imperial gallon is 4.546 L (160 UK fl oz). Cooking units (tsp = 4.93 ml, tbsp = 14.79 ml, cup = 240 ml) follow the US standard in nearly all modern English-language recipes.

Related tools

Liters to US Gallons
Convert liters to US gallons — 1 L = 0.2642 US gal
UK Gallons to Liters
Convert UK imperial gallons to liters — 1 UK gal = 4.5461 L
US Gallons to UK Gallons
Convert US gallons to UK imperial gallons — 1 US gal ≈ 0.833 UK gal
Volume Converter
Convert volumes — ml, L, m³, cups, tbsp, fl oz, US/UK gallons and pints