Gallons to Liters Converter
Convert US liquid gallons (gal) to liters (L) with live precision. Essential for automobile fuel economy, chemical tanks, and liquid volumes.
liters = gallons × 3.78541 Formula & Mathematical Derivation
Official equation for converting Gallons (US) to Liters.
Contextual Background & Unit Standards
The United States customary liquid gallon is legally defined as exactly 231 cubic inches, which equates to approximately 3.785411784 liters. The liter is a metric unit of volume equal to one cubic decimeter (0.001 m³). Converting US gallons to liters requires multiplying the gallon volume by 3.785411784. For example, a 15-gallon automobile fuel tank holds 15 multiplied by 3.78541, resulting in approximately 56.78 liters of gasoline. Note that the British Imperial gallon is larger (4.54609 liters); this calculator specifically converts the US liquid gallon standard commonly used throughout North American automotive, agricultural, and commercial logistics.
Quick Reference Conversion Table
Pre-computed lookup values for instant reference. 100% static & search-engine indexable.
| Gallons (US) | Liters | Instant Copy |
|---|---|---|
| 1 Gallons (US) | 3.7854 Liters | |
| 2 Gallons (US) | 7.5708 Liters | |
| 5 Gallons (US) | 18.9271 Liters | |
| 10 Gallons (US) | 37.8541 Liters | |
| 12 Gallons (US) | 45.4249 Liters | |
| 15 Gallons (US) | 56.7812 Liters | |
| 20 Gallons (US) | 75.7082 Liters | |
| 50 Gallons (US) | 189.2706 Liters |
Gallons to Liters Converter FAQs
Expert answers to common calculation and conversion questions.
Q How many liters are in one US liquid gallon?
Q What is a 12-gallon gas tank in liters?
Q Is a US gallon the same as an Imperial UK gallon?
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