Koverts/Volume/1 gal → L
🧪 Volume Converter

1 Gallon US (gal) to Liter (L)

1 gal =3.78541L

Use the converter below for any value, or see the full table.

Direct Answer

1 gal = 3.78541 L

Formula: L = gal × 3.78541. This page supports instant conversion, reference table checks, and related unit links.

About this conversion

This Koverts page converts US liquid gallons (gal) to liters (L) using the US customary definition — not the UK imperial gallon, which is larger.

The US liquid gallon is 231 cubic inches and equals exactly 3.785411784 liters. It is used for fuel labels, beverages, and pool volumes in the United States.

The liter (L) is a metric unit of volume equal to one cubic decimeter. It is the standard for fuel economy (L/100 km), beverages, and scientific measurements worldwide.

Typical uses

  • Reading US fuel economy and tank sizes in metric regions
  • Converting pool, aquarium, and irrigation volumes
  • Scaling beverage and recipe quantities across borders
  • Comparing water heater and appliance capacities
FormulaL = gal × 3.78541

Common reference values

  • 1 gal = 3.78541 L
  • 2 gal = 7.57082 L
  • 5 gal = 18.92705 L
  • 10 gal = 37.8541 L

Tip: Multiply US gallons by about 3.785 to get liters. So 10 gal × 3.785 ≈ 37.85 L.

Did you know? A US gallon of pure water weighs about 8.34 pounds at 62 °F — handy for rough weight checks of liquid loads.

Educational reference — always verify critical measurements (medical, engineering, legal) with primary sources.

🧪 Volume Converter← Volume

Result

3.78541L

1 gal = 3.78541 L

Popular conversions

// gallon_us Conversion table liter

Gallon US (gal) (gal)Liter (L) (L)
1 gal3.78541 L
2 gal7.57082 L
5 gal18.92705 L
10 gal37.8541 L
20 gal75.7082 L
25 gal94.63525 L
50 gal189.2705 L
100 gal378.541 L
250 gal946.3525 L
500 gal1,892.705 L
1000 gal3,785.41 L
Any amountL → gal10 gal →100 gal →

How to convert

Gallon US (gal) → Liter (L)

To convert from Gallon US (gal) (gal) to Liter (L) (L)，multiply your value by 3.78541.

L = gal × 3.78541

For example，10 gal = 37.8541 L.

// Frequently Asked Questions

Is a US gallon the same as a UK gallon?▼
No. The US liquid gallon is about 3.785 L, while the UK imperial gallon is about 4.546 L. This converter uses the US definition only.
Why do fuel economy numbers look so different between MPG and L/100 km?▼
They measure the same idea differently: MPG is distance per volume, while L/100 km is volume per distance — lower L/100 km means better efficiency, but higher MPG also means better efficiency. Convert gallons to liters here, then use a fuel-economy converter for the full cross-format math.
How many liters are in one US gallon exactly?▼
One US liquid gallon is defined as exactly 3.785411784 liters. For everyday use, 3.785 L is usually accurate enough; this page uses the full precision in the calculator.
What is 1 gal in L?▼
1 gal = 3.78541 L.
How is the conversion calculated?▼
L = gal × 3.78541.
Can I convert other values?▼
Yes. Use the converter box above to enter any value and get instant results.

// Common related conversions

L → gal

Liter (L) → Gallon US (gal)

L → mL

Liter (L) → Milliliter (mL)

mL → L

Milliliter (mL) → Liter (L)

qt → mL

Quart (qt) → Milliliter (mL)

c → mL

Cup (c) → Milliliter (mL)

fl oz → L

Fluid Ounce (fl oz) → Liter (L)

L → m³

Liter (L) → Cubic Meter (m³)

pt → mL

Pint (pt) → Milliliter (mL)

// Related conversions

gal → mL

Milliliter (mL)

gal → qt

Quart (qt)

gal → pt

Pint (pt)

gal → c

Cup (c)