How do I convert US gallon (gal) to Liter (L)?

1 gal equals 3.785412 l using SI-based conversion and precise factors.

What is the formula to convert US gallon (gal) to Liter (L)?

This is a linear unit conversion using a constant factor between units.

Yes, it uses exact definitions or standardized constants (e.g., 1 in = 25.4 mm).

Use the shareable URL pattern: /convert/gal-to-l/1

Category: Volume

Value From To Precision

3.785412 l

1 gal = 3.785412 l

High-precision rounding: 6 decimals

We convert by pivoting through the SI base unit for Volume and applying exact factors where applicable.

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Volume measures space occupied. Liters and gallons are common in daily life.

US gallon (gal)

3.785411784 L (exact).

History: US defined its own gallon; differs from Imperial.

Liter (L)

1 dm³; common for beverages and fuel.

History: Rooted in early metric definitions; modern symbol ‘L’ widely accepted.