Loona Calculators
Convert gallons (us) to litres instantly — type any value and the result appears as you type. Below you will find the exact formula, a gal to L conversion table and a worked example.
Formula: Litres = US gallons × 3.78541. One US gallon is defined as exactly 3.785411784 litres.
Question: How many litres is 10 gal — a large water container or fuel can?
Steps: Take the value in gallons (us): 10 gal. Apply the formula: Litres = US gallons × 3. That gives 10 → 37.8541 L (rounded to four decimal places).
Result: 10 gal = 37.8541 L.
| Gallons (US) (gal) | Litres (L) |
| 1 gal | 3.7854 L |
| 2 gal | 7.5708 L |
| 5 gal | 18.9271 L |
| 10 gal | 37.8541 L |
| 15 gal | 56.7812 L |
| 20 gal | 75.7082 L |
| 25 gal | 94.6352 L |
| 30 gal | 113.5623 L |
| 50 gal | 189.2705 L |
| 100 gal | 378.541 L |
Need a value that is not in the table — or the reverse direction? Use the converter at the top of this page or the litres to gallons converter, or the full Unit Converter for every unit in one place.
Multiply the value in gallons (us) by 3.7854: gal × 3.7854 = L. For example, 10 gal × 3.7854 = 37.8541 L. The converter above does this instantly.
Exactly 3.7854 L (to four decimal places). The full relationship: Litres = US gallons × 3.
5 US gallons = 18.9271 litres.
Use the reverse conversion — our litres to gallons converter does it instantly. For a quick check, divide by the same factor instead of multiplying.
4.54609 litres — about 20% more than a US gallon. This converter uses US gallons; multiply imperial gallons by 4.54609 instead.
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