Gallons (US) to Liters Conversion
to
Gallons (US)
gal (US)
Result
Calculation steps
About this conversion
Intro
This page converts gallons (us) (gal (US)) to liters (L). Use it when your value is in gallons (us) and you need the equivalent in liters for recipes, packaging, lab work, or engineering calculations.
Definition
Volume measures how much space a substance or container occupies. It’s used in cooking, medicine, lab work, packaging, engineering, and construction. Quick context on liters: Liters (L) are widely used for beverages, fuel, and everyday liquid volume measurements (especially metric).
Formula: Gallons (US) to Liters
liters = gallons (us) × 3.785411784
This converter uses liters (L) as a stable base: it converts gallons (us) to liters first, then converts liters to liters. That keeps metric, US customary, UK imperial, and cubic units consistent.
Worked examples
Example 1: 1 gal (US) → 3.785411784 L
- Start with 1 gal (US).
- Multiply by the conversion ratio (3.785411784).
- 1 × 3.785411784 = 3.785411784 L.
Example 2: 5 gal (US) → 18.92705892 L
- Start with 5 gal (US).
- Multiply by the conversion ratio (3.785411784).
- 5 × 3.785411784 = 18.92705892 L.
Example 3: 20 gal (US) → 75.70823568 L
- Start with 20 gal (US).
- Multiply by the conversion ratio (3.785411784).
- 20 × 3.785411784 = 75.70823568 L.
Quick reference table
| From | To |
|---|---|
| 0.5 gal (US) | 1.892705892 L |
| 1 gal (US) | 3.785411784 L |
| 2 gal (US) | 7.570823568 L |
| 3 gal (US) | 11.356235352 L |
| 5 gal (US) | 18.92705892 L |
| 10 gal (US) | 37.85411784 L |
| 20 gal (US) | 75.70823568 L |
| 50 gal (US) | 189.2705892 L |
FAQs
How do I convert gallons (us) to liters?
Use the formula: liters = gallons (us) × 3.785411784. Enter a value above and the converter calculates instantly.
How many liters are in 1 US gallon?
1 US gallon ≈ 3.785411784 liters. US customary and UK imperial measures can differ, so confirm you selected the right system.
What is Liters (L) used for?
Liters (L) are widely used for beverages, fuel, and everyday liquid volume measurements (especially metric).
Is 1 mL the same as 1 cm³?
Yes. 1 milliliter equals exactly 1 cubic centimeter.
Why do US and UK fluid ounces/pints/gallons give different results?
Because US customary and UK (imperial) units are defined differently. A UK pint and gallon are larger than the US equivalents.
Which base unit does this converter use internally?
For consistency, this page uses liters (L) as a base reference: it converts the input to liters and then converts liters to the selected output unit.