Gallon (US) to LiterConverter
Instantly convert Gallon (US) (gal) to Liter (l). Free, accurate, and easy to use.
How to Convert Gallon (US) to Liter
To convert Gallon (US) (gal) to Liter (l), multiply your value by 3.78541.
Example: 5 gal × 3.78541 = 18.92705 l
What is a Gallon (US)?
The US liquid gallon equals 128 fluid ounces, 8 pints, or approximately 3.785 liters. It is the standard unit for fuel, water, and large liquid volumes in the United States. The UK imperial gallon is larger at approximately 4.546 liters — about 20% more. The gallon difference is a common source of confusion for international recipes and fuel economy figures.
What is a Liter?
The liter is the standard metric unit for liquid volume, equal to exactly 1 cubic decimeter (dm³) or 1,000 milliliters. It is used worldwide for beverages, fuel, and general liquid quantities. One liter equals approximately 1.0567 US liquid quarts or 0.2642 US gallons. Standard plastic water bottles are sold in 0.5 L and 1 L sizes in most countries.
Gallon (US) to Liter Conversion Table
| Gallon (US) (gal) | Liter (l) |
|---|---|
| 0.001 gal | 0.00378541 l |
| 0.01 gal | 0.0378541 l |
| 0.1 gal | 0.378541 l |
| 0.5 gal | 1.892705 l |
| 1 gal | 3.78541 l |
| 2 gal | 7.57082 l |
| 5 gal | 18.92705 l |
| 10 gal | 37.8541 l |
| 20 gal | 75.7082 l |
| 50 gal | 189.2705 l |
| 100 gal | 378.541 l |
| 200 gal | 757.082 l |
| 500 gal | 1892.705 l |
| 1000 gal | 3785.41 l |
| 5000 gal | 18927.05 l |
| 10000 gal | 37854.1 l |
| 50000 gal | 189270.5 l |
| 100000 gal | 378541 l |
| 1000000 gal | 3785410 l |
| 1000000000 gal | 3.7854e+9 l |
Frequently Asked Questions
How do I convert Gallon (US) to Liter?
Multiply the Gallon (US) value by 3.78541. Formula: l = gal × 3.78541. Example: 10 gal = 37.8541 l.
How many Liter are in one Gallon (US)?
One Gallon (US) (gal) equals 3.78541 Liter (l).
How many Gallon (US) are in one Liter?
One Liter (l) equals 0.26417218 Gallon (US) (gal).
What is the exact conversion factor from Gallon (US) to Liter?
The conversion factor is 3.78541. Multiply any gal value by this number to get l. For the reverse, multiply by 0.26417218.
How do I convert Liter back to Gallon (US)?
Divide by 3.78541, or equivalently multiply by 0.26417218. Formula: gal = l ÷ 3.78541.
Is the Gallon (US)-to-Liter conversion internationally standardized?
Yes. Both units are defined by international standards (SI or the international yard/pound agreement), so the conversion factor 3.78541 is exact and universally agreed upon.