Convert Gallons [liquid] (gal) to Liters (L)

1 gallon [liquid] equals 3.78541 liters.

Formula: L = gal × 3.78541

Gallon [liquid] to Liter Converter

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How to Convert Gallon [liquid] to Liter

1 gallon [liquid] = 3.78541 liters exact

Liter = Gallon [liquid] × 3.78541

Example: 1 gal × 3.78541 = 3.78541 L

Reverse Conversion

To convert liters back to gallons [liquid]:

  • Remember, 1 liter equals 0.264172 gallons [liquid].
  • To convert 3.78541 L to gal, multiply 3.78541 x 0.264172, resulting in 1 gal.

exact This conversion factor is exact by international definition.

Common Gallon [liquid] to Liter Conversions

Gallon [liquid] to Liter (Part 1)
Gallon [liquid] Liter Actions
12 gallons [liquid] 1.89271 liters
1 gallon [liquid] 3.78541 liters
2 gallons [liquid] 7.57082 liters
Gallon [liquid] to Liter (Part 2)
Gallon [liquid] Liter Actions
5 gallons [liquid] 18.9271 liters
10 gallons [liquid] 37.8541 liters

Gallons [liquid] to liters Conversion Table

Reference table with common gallons [liquid] to liters conversions. All values calculated with high precision.

Gallons [liquid] to Liters Table
0.0001 to 12

Gallons [liquid] Liters Actions
0.0001 gal 0.000378541 L
0.00025 gal 0.000946353 L
0.0005 gal 0.00189271 L
0.001 gal 0.00378541 L
0.0025 gal 0.00946353 L
0.005 gal 0.0189271 L
0.01 gal 0.0378541 L
0.025 gal 0.0946353 L
0.05 gal 0.189271 L
0.1 gal 0.378541 L
14 gal 0.946353 L
12 gal 1.89271 L

Gallons [liquid] to Liters Table
1 to 100000

Gallons [liquid] Liters Actions
1 gal 3.78541 L
12 gal 9.46353 L
5 gal 18.9271 L
10 gal 37.8541 L
25 gal 94.6353 L
50 gal 189.271 L
100 gal 378.541 L
250 gal 946.353 L
500 gal 1892.71 L
1000 gal 3785.41 L
2500 gal 9463.53 L
5000 gal 18927.1 L
10000 gal 37854.1 L
25000 gal 94635.3 L
50000 gal 189271 L
100000 gal 378541 L

Liters to Gallons [liquid] Table
0.001 to 5

Liters Gallons [liquid] Actions
0.001 L 0.000264172 gal
0.0025 L 0.00066043 gal
0.005 L 0.00132086 gal
0.01 L 0.00264172 gal
0.025 L 0.0066043 gal
0.05 L 0.0132086 gal
0.1 L 0.0264172 gal
14 L 0.066043 gal
12 L 0.132086 gal
1 L 0.264172 gal
12 L 0.66043 gal
5 L 1.32086 gal

Liters to Gallons [liquid] Table
10 to 1000000

Liters Gallons [liquid] Actions
10 L 2.64172 gal
25 L 6.6043 gal
50 L 13.2086 gal
100 L 26.4172 gal
250 L 66.043 gal
500 L 132.086 gal
1000 L 264.172 gal
2500 L 660.43 gal
5000 L 1320.86 gal
10000 L 2641.72 gal
25000 L 6604.3 gal
50000 L 13208.6 gal
100000 L 26417.2 gal
250000 L 66043 gal
500000 L 132086 gal
1000000 L 264172 gal

Definition of Gallon [liquid]

Liquid Gallon: A Standard Unit of Liquid Volume

The liquid gallon is a unit of volume measurement commonly used to quantify the volume of liquids such as water, milk, gasoline, and other fluids. In the United States, a liquid gallon is defined as 231 cubic inches or approximately 3.78541 liters. It plays a crucial role in various industries, including agriculture, manufacturing, transportation, and household consumption.

Conversions to Other Units of Measurement:

  1. Liters: 1 liquid gallon is equivalent to approximately 3.78541 liters. This conversion is useful for international trade and scientific measurements.
  2. Quarts: 1 liquid gallon is equal to 4 quarts. This conversion is commonly used in recipes and food preparation, especially in the United States.
  3. Cubic Meters: 1 liquid gallon is equivalent to approximately 0.00378541 cubic meters. This conversion is relevant in engineering, construction, and fluid dynamics calculations.
  4. Fluid Ounces: 1 liquid gallon is equal to approximately 128 fluid ounces. This conversion is used for labeling and packaging beverages and other liquids.
  5. Barrels: 1 liquid gallon is approximately 0.03125 barrels. This conversion is relevant in the petroleum industry for measuring oil and fuel volumes.

The liquid gallon is indispensable for accurate measurements and calculations in various industries and everyday tasks. Whether it's measuring fuel for vehicles, calculating ingredient quantities in recipes, or determining irrigation needs in agriculture, the liquid gallon serves as a fundamental unit of liquid volume.

Definition of Liter

The liter or litre

The liter is a unit of volume measurement in the metric system, widely used across various fields and industries. It is particularly significant in everyday life for measuring quantities of liquids and gases. One liter (L) is defined as the volume occupied by a cube with sides of 10 centimeters in length. Its relevance spans industries such as food and beverage, pharmaceuticals, automotive, and agriculture.

Conversions

  1. Liters to Cubic Meters: 1 liter is equivalent to 0.001 cubic meters. This conversion is essential for large-scale volume measurements, such as in construction and urban planning.
  2. Liters to Quarts: 1 liter is approximately equal to 1.0567 US quarts. This conversion is commonly used in cooking and recipe measurements.
  3. Liters to Fluid Ounces: 1 liter is approximately 33.814 fluid ounces. This conversion is useful for understanding beverage sizes and nutritional information.
  4. Liters to Barrels: 1 liter is roughly 0.008386 barrels. This conversion is crucial in the oil and gas industry for measuring oil volumes.
  5. Liters to Gallons: 1 liter is approximately 0.264172 US gallons. This conversion is important for fuel and liquid transportation measurements.
  6. Liters to Pints: 1 liter is approximately 2.11338 US pints. This conversion is commonly used in beverage and recipe measurements.

About the Liter

Facts & Uses

  • Metric standard for liquids — 1 liter = 1 cubic decimeter = 0.001 m³ exactly. Used worldwide for fuel, beverages, and chemistry.
  • Reference for fuel pricing in most of the world ($/L), beverage packaging (1 L bottles, 2 L sodas), and medical IV bags.
  • Cooking standard outside the US: 250 mL ≈ 1 metric cup, 500 mL = ½ liter, 1 L ≈ 4.227 US cups.
  • Common engine sizes: 1.0 L, 1.5 L, 2.0 L displacement; aquariums and water tanks rated in liters.

Curiosities

  • Originally defined in 1795 as 1 dm³; redefined 1901-1964 as the volume of 1 kg of water at 4 °C (≈ 1.000028 dm³); reverted to exact 1 dm³ in 1964.
  • The liter is not an SI unit — but it's accepted for use with the SI system. Both L (capital, US/IUPAC) and l (lowercase) are valid symbols.
  • 1 liter of water at 4 °C weighs almost exactly 1 kg — a useful kitchen approximation, though not perfectly exact since 1964.
  • Approximate equivalents: 1 L ≈ 33.814 fl oz (US) ≈ 0.2642 US gallons ≈ 0.22 imperial gallons.

Sources

Frequently Asked Questions

How many liters are in one gallon [liquid]?

One gallon [liquid] equals 3.78541 liters. To convert, multiply the gallon [liquid] value by 3.78541. For the reverse, divide the liter value by 3.78541 (or multiply by 0.264172).

What is 0.65 gallons [liquid] in liters?

0.65 gallons [liquid] = 2.4605 liters. This is one of the most commonly searched conversions for this pair.

How precise is the gallon [liquid]-to-liter conversion?

The factor 3.78541 is accurate to 6 significant figures, derived from international measurement standards. Our calculator uses full precision internally.

Looking for the reverse? Convert Liter to Gallon [liquid]

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Conversion factors verified against NIST, BIPM, ISO 80000-3 1 US gallon = 3.785411784 L (exact, US customary). Last reviewed: March 2026
Tiago Fernandes Reviewed by Tiago Fernandes

All unit conversions on CoolConversion use conversion factors defined or documented by internationally recognised standards bodies (such as ISO and NIST), including both SI and non-SI units.

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