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Convert US gallons to liters
Instant, accurate gal → L conversion with a live converter, table and formula.
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1 US gallon = 3.78541 liters
1 liter = 0.264172 US gallons
US gallons to liters table
| US gallons (gal) | liters (L) |
|---|---|
| 0.5 | 1.89271 |
| 1 | 3.78541 |
| 2 | 7.57082 |
| 5 | 18.9271 |
| 10 | 37.8541 |
| 20 | 75.7082 |
| 50 | 189.271 |
| 100 | 378.541 |
| 500 | 1892.71 |
| 1000 | 3785.41 |
Formula
liters = US gallons × 3.78541.
Example
10 US gallons = 37.8541 liters.
What is a US gallon?
A US gallon is 3.785 liters (128 US fluid ounces).
What is a liter?
A liter (L) is the metric volume unit equal to 1,000 ml or one cubic decimeter.
Real-world reference points
A liter is a large water bottle; a US cup is a small glass; a teaspoon is a sip of medicine.
| Reference | US gallons | liters |
|---|---|---|
| Teaspoon of medicine | 0.00132 gal | 0.005 L |
| Soda can | 0.0872 gal | 0.33 L |
| Water bottle | 0.132 gal | 0.5 L |
| Car fuel tank (typical) | 13.21 gal | 50 L |
| Bathtub | 39.63 gal | 150 L |
Mistakes to avoid with volume conversions
- US vs imperial gallons: the imperial gallon is ~20% larger — UK fuel-economy figures aren't US ones.
- Converting milliliters to grams for ingredients that aren't water — oil, flour and honey have different densities.
- US recipe cups (236.6 ml) vs metric cups (250 ml) — a 5% error that ruins delicate baking.
Frequently asked questions
How many liters in a US gallons?+
1 US gallon = 3.78541 liters.
How do I convert US gallons to liters?+
Enter the value in the US gallons box above and the liters value appears instantly. You can also type in the liters box to convert the other way.
Is this gal to L converter free?+
Yes — it is 100% free, needs no sign-up, and runs entirely in your browser.