Volume converter

US Gallons to
Liters

Convert US liquid gallons to liters with a precise result.

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How to convert us gallons to liters

Use the formula below. ConvertPulse keeps the full conversion constant during calculation and rounds only the displayed result.

US Gallons × 3.785411784 = Liters

For example, 10 gal equals 37.85411784 L.

US Gallons to Liters reference table

US GallonsLiters
1 gal3.78541178 L
5 gal18.92705892 L
10 gal37.85411784 L
25 gal94.6352946 L
50 gal189.2705892 L
100 gal378.5411784 L

Understanding the result

Keep extra decimal places while you work, then round once at the end. For everyday use, two to four decimal places is usually enough. Scientific, engineering, and regulated work may require a specified precision or reference standard.

US gallons to liters for fuel and capacity

This converter uses the US liquid gallon, equal to exactly 231 cubic inches or 3.785411784 liters. It is appropriate for US fuel economy, tank capacity, and liquid-container values.

  • Do not apply this factor to an imperial gallon.
  • Multiply US gallons by about 3.785 for a quick estimate.
  • Rated tank capacity and usable capacity can differ in real equipment.

Reference: NIST volume conversion factors.

Frequently asked questions

What is the conversion formula?

US Gallons × 3.785411784 = Liters.

How accurate is this converter?

ConvertPulse uses established conversion constants and keeps additional precision during calculation before displaying a readable result.

Can I use this result for professional work?

The calculation is suitable for general use. Regulated engineering, medical, or legal work may require specific rounding rules and independently verified standards.