Gallons to Liters Converter
Convert US gallons (gal) to liters (L) instantly with accurate results.
1 US Gallon (gal) = 3.78541 Liter (L)
Conversion Table
| US Gallon (gal) | Liter (L) |
|---|---|
| 1 gal | 3.78541 L |
| 5 gal | 18.92705 L |
| 10 gal | 37.8541 L |
| 25 gal | 94.63525 L |
| 50 gal | 189.2705 L |
| 100 gal | 378.541 L |
| 500 gal | 1892.705 L |
| 1000 gal | 3785.41 L |
What Is Gallons to Liters Conversion?
Converting US gallons to liters translates volume from the US customary system to the metric system. One US gallon equals exactly 3.785411784 liters. This conversion is essential for international fluid measurements including fuel, beverages, chemicals, and water volumes.
Conversion Formula
Liters = US Gallons × 3.78541
Conversion Table
| gal | L |
|---|---|
| 1 | 3.78541 |
| 5 | 18.92705 |
| 10 | 37.8541 |
| 25 | 94.63525 |
| 50 | 189.2705 |
| 100 | 378.541 |
| 250 | 946.3525 |
| 500 | 1892.705 |
| 1000 | 3785.41 |
Practical Examples
A standard US milk jug holds 1 gallon, which equals approximately 3.785 liters — useful when comparing to metric-sized containers. If your car's fuel tank holds 15 gallons, that is about 56.8 liters, the unit used on fuel pumps in most countries outside the US. A 5-gallon water cooler jug converts to roughly 18.9 liters, the standard size you would see in international offices. Swimming pools holding 20,000 gallons contain approximately 75,708 liters, a scale useful for chemical treatment calculations in metric units.
When Do You Need This Conversion?
You need gallons to liters conversion when traveling to metric countries and purchasing fuel, converting American recipes to metric measurements, understanding water usage reports, or comparing product volumes across international markets.
Related Conversions
Frequently Asked Questions
One US gallon equals approximately 3.78541 liters. For quick mental math, one gallon is roughly 3.8 liters, or about 4 liters for a rough estimate. Remember that US gallons and Imperial gallons are different — 1 Imperial gallon = 4.54609 liters.
5 US gallons equals 18.927 liters (5 × 3.78541). A standard 5-gallon water cooler jug holds about 18.9 liters. Common conversions: 1 gal = 3.79 L, 2 gal = 7.57 L, 5 gal = 18.93 L, 10 gal = 37.85 L.
To convert MPG (US) to L/100km, divide 235.215 by the MPG value. For example, 30 MPG = 235.215 ÷ 30 = 7.84 L/100km. For Imperial MPG, divide 282.481 by the MPG value. Lower L/100km means better fuel efficiency.