Gallons to Liters Converter
Convert gallons (gal) to liters (L) instantly. Fast, accurate converter for recipes, fuel calculations, and liquid measurements.
Common in US for large volumes
Metric system base unit
Quick Conversion Formulas
Common Volume Reference Points
Measuring Cup
240 mL / 1 cup / 8 fl oz
Water Bottle
500 mL / 16.9 fl oz
Gallon of Milk
3.78 L / 1 gal / 16 cups
Tablespoon
15 mL / 3 tsp / 0.5 fl oz
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Gallons to Liters Formula
liters = gallons × 3.78541
How to convert gallons to liters:
- Take the number of gallons you want to convert
- Multiply by 3.78541 (the conversion factor)
- The result is the volume in liters
Example:
Convert 5 gallons to liters:
liters = 5 × 3.78541 = 18.93 L
⚠️ Important Disclaimer
This tool provides estimates for informational purposes only. Results should not be relied upon for important decisions. Always consult with a qualified professional for advice specific to your situation.
Gallons to Liters Conversion Table
| Gallons (gal) | Liters (L) | Common Use |
|---|---|---|
| 0.25 gal | 0.95 L | Quart of milk |
| 0.5 gal | 1.89 L | Half gallon milk |
| 1 gal | 3.79 L | Gallon of milk |
| 2 gal | 7.57 L | Large recipe batch |
| 5 gal | 18.93 L | Bucket, large aquarium |
| 10 gal | 37.85 L | Medium aquarium |
| 15 gal | 56.78 L | Fuel tank |
| 20 gal | 75.71 L | Large fuel tank |
| 25 gal | 94.64 L | Brewing batch |
| 50 gal | 189.27 L | Large container |
Understanding Gallons and Liters
The Gallon (gal)
The US gallon is an imperial unit of volume used primarily in the United States. It's the standard for large liquid quantities like milk, gasoline, and water.
Common uses for gallons:
- Milk and juice containers
- Gasoline and fuel measurements
- Aquarium sizes (5 gal, 10 gal, etc.)
- Paint and chemical containers
The Liter (L)
The liter is a metric unit of volume used globally. It's the standard unit for measuring liquids in most countries and all scientific contexts.
Common uses for liters:
- Beverage packaging worldwide
- Cooking and recipe measurements
- Fuel efficiency (liters per 100 km)
- Scientific and medical applications
Quick tip: Remember that 1 gallon is approximately 4 liters (3.785 L to be exact). This makes mental math easier when converting.
Frequently Asked Questions
How many liters are in 1 gallon?
1 US gallon equals 3.78541 liters. For quick estimates, you can use 3.8 liters or even 4 liters as a rough approximation.
What is 1 gallon in liters?
1 gallon = 3.78541 liters. This is useful when converting fuel consumption, recipe quantities, or container sizes from imperial to metric.
How to convert gallons to liters for recipes?
Multiply the number of gallons by 3.78541. For example, 2 gallons of stock = 2 × 3.78541 = 7.57 liters.
How many liters in a half gallon?
A half gallon equals 1.89 liters (0.5 × 3.78541 = 1.89). This is a common size for milk containers in the US.
Is a liter bigger than a gallon?
No, a gallon is bigger than a liter. One gallon contains about 3.8 liters, so a gallon is nearly 4 times larger than a liter.