Why Convert US Gallons to Liters?
Converting between us gallons (gal (US)) and liters (L) is one of the most common volume conversions. Whether for engineering, cooking, travel, or science, knowing how to quickly convert gal (US) to L saves time and prevents errors.
Volume conversions between gal (US) and L are vital for cooking, travel, and automotive contexts. The TSA 3-1-1 rule limits carry-on liquids to 100 mL (3.4 fl oz) containers — a conversion every international traveler needs. In cooking, US recipes use cups and tablespoons while metric recipes use milliliters. For automotive purposes, fuel tank capacity is measured in liters in most countries but gallons in the US.
How to Convert US Gallons to Liters
To convert us gallons to liters, use the following formula:
L = gal (US) × 3.785411784
Example: 1 gal (US) = 3.785411784 L
For example, 5 gal (US) = 18.92705892 L, 10 gal (US) = 37.85411784 L, and 100 gal (US) = 378.5411784 L. Our calculator above performs this conversion instantly with full precision — no rounding errors.
Common Use Cases
- Gallon jug of milk (US): 1 gal (US) = 3.785411784 L
- Compact car fuel tank: 15 gal (US) = 56.78117676 L
- Large fuel can / jerry can: 5 gal (US) = 18.92705892 L
- Standard drum barrel: 55 gal (US) = 208.1976481 L
Common Mistakes to Avoid
- US vs UK gallons: A US gallon (3.785 L) is smaller than a UK gallon (4.546 L). Always specify which system you're using.
- Fluid ounces vary: US fluid ounce ≠ UK fluid ounce. This converter uses US measures unless specified as UK.
- Cup measurement inconsistency: A US cup = 236.6 mL, metric cup = 250 mL, Japanese cup = 200 mL. Always verify which standard your recipe uses.
Pro Tips
- Memorize the factor: 1 gal (US) = 3.785411784 L. For quick mental math, remember this base conversion.
- Quick reference: 5 gal (US) = 18.92705892 L · 10 gal (US) = 37.85411784 L · 25 gal (US) = 94.6352946 L · 50 gal (US) = 189.2705892 L · 100 gal (US) = 378.5411784 L
- Bookmark this page: Save this converter for instant access. It works offline once loaded — no internet needed.
US Gallons to Liters Conversion Table
| gal (US) | L |
|---|---|
| 0.01 gal (US) | 0.03785411784 L |
| 0.1 gal (US) | 0.3785411784 L |
| 0.5 gal (US) | 1.892705892 L |
| 1 gal (US) | 3.785411784 L |
| 2 gal (US) | 7.570823568 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 |
| 100 gal (US) | 378.5411784 L |
| 500 gal (US) | 1892.705892 L |
| 1000 gal (US) | 3785.411784 L |
All values in this table are mathematically exact per NIST SP 811.