Gallons (US) to Liters Converter

Convert Gallons (US) (gal) to Liters (l) instantly. Free online unit converter.

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Gallons (US)

Liters

1 gal = 3.78541 l

Referentietabel

1 gal

3.78541

5 gal

18.92705

10 gal

37.8541

50 gal

189.2705

100 gal

378.541

Conversieresultaten

Liters

Milliliters

Cubic Meters

Conversion Formula

1 Gallons (US) = 3.78541 Liters

1 Liters = 0.2642 Gallons (US)

Quick Reference Table

Gallons (US)	Liters
1 gal	3.78541 l
5 gal	18.9271 l
10 gal	37.8541 l
50 gal	189.27 l
100 gal	378.541 l
500 gal	1,892.71 l
1,000 gal	3,785.41 l

About These Units

Converting Gallons (US) to Liters comes down to a single multiplication: each Gallons (US) equals 3.78541 Liters. For example, 10 Gallons (US) works out to 37.8541 Liters. Use the live calculator above for any value, or follow the exact formula and reference table below — no rounding errors, no guesswork.

Volume measures three-dimensional space — how much liquid a container holds, or how much air is in a room. The metric system uses liters and cubic meters; the US uses cups, gallons, and fluid ounces (which differ from US Imperial gallons — UK 1 gallon = 4.546 L vs US 1 gallon = 3.785 L). This tool uses US gallons by default. Volume conversion is crucial for cooking, fuel economy, brewing, chemistry, and shipping container sizing.

About Gallons (US)

The US gallon is exactly 3.785 liters (4 quarts or 128 fluid ounces) — the standard fuel and large-liquid unit in the US.

History

From medieval English measurement; the US gallon differs from the UK imperial gallon (4.546 L).

Common Use

Used for gasoline in the US (price per gallon), milk jugs, paint cans, and water heater capacities.

About Liters

The liter (L) is 1,000 cubic centimeters or 1/1,000 of a cubic meter — the standard metric volume unit.

History

Introduced in France in 1795 as a metric unit; one liter of water weighs almost exactly one kilogram.

Common Use

Used worldwide for beverages, fuel (in most countries), engine displacement, and lab measurements.

When Conversion Is Needed

Gallons (US) and Liters belong to different measurement systems, so conversion becomes necessary when comparing values across the two units, or when forwarding a document or specification written in one unit to someone who uses the other. The quick-reference table on this page shows how common values in Gallons (US) translate to Liters, so memorizing or bookmarking the most frequently-used values is often a worthwhile shortcut.

Real-World Use Cases

Cooking & Bartending

Translating recipes between cups (US), milliliters (Europe), and tablespoons requires careful volume conversion. A 'cup' in the US (240 mL) differs from a UK 'cup' (284 mL), so check the recipe's origin.

Fuel & Travel

Gas prices are quoted per gallon in the US, per liter elsewhere. Converting helps compare costs across borders. 1 US gallon ≈ 3.785 liters, so a $4/gal price equals about $1.06/L.

Related Converters

Liters to Milliliters Liters to Gallons (US)Liters to Cubic Meters Milliliters to Liters Milliliters to Gallons (US)Milliliters to Cubic Meters Gallons (US) to Milliliters Gallons (US) to Cubic Meters

Frequently Asked Questions

How do I convert Gallons (US) to Liters?

Multiply the number of Gallons (US) by 3.78541. For instance, 10 Gallons (US) × 3.78541 = 37.8541 Liters. The calculator on this page does it instantly as you type.

How many Liters are in one Gallons (US)?

One Gallons (US) equals exactly 3.78541 Liters. Going the other way, one Liters equals 0.2642 Gallons (US).

Is this Gallons (US)-to-Liters conversion accurate?

Yes. The result uses double-precision arithmetic and internationally accepted conversion constants, rounding only for display — so it is reliable for engineering, cooking, shipping, and schoolwork alike.