📏 US gallons to Liters Converter
Convert us gallons (gal) to liters (L) instantly, with the formula, a worked example and a conversion table.
Quick answer: 1 us gallon (gal) = 3.7854118 liters (L). Formula: L = gal × 3.7854118.
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US gallons to Liters Converter inputs
Result
US gallons to Liters conversion table
| US gallons (gal) | Liters (L) |
|---|---|
| 0.1 gal | 0.37854118 L |
| 0.5 gal | 1.8927059 L |
| 1 gal | 3.7854118 L |
| 2 gal | 7.5708236 L |
| 3 gal | 11.356235 L |
| 5 gal | 18.927059 L |
| 10 gal | 37.854118 L |
| 20 gal | 75.708236 L |
| 25 gal | 94.635295 L |
| 50 gal | 189.27059 L |
| 100 gal | 378.54118 L |
| 1,000 gal | 3,785.4118 L |
Other volume conversions
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How to convert us gallons to liters
Multiply the number of us gallons by 3.7854118 to get liters: L = gal × 3.7854118.
Example: 5 gal = 18.927059 L.
The us gallon (gal) and the liter (L) are both units of volume. Need the opposite direction? Use the L to gal converter.
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Metric and imperial units
The metric system (SI) is used by almost every country and by science worldwide. Its units scale by powers of ten – 1 kilometer is 1,000 meters, 1 meter is 100 centimeters – which makes conversions inside the system easy. The imperial and US customary systems (inches, feet, pounds, gallons) are still used daily in the United States and partly in the UK.
Since 1959 the inch has been defined as exactly 2.54 centimeters and the pound as exactly 0.45359237 kilograms, so conversions between the two systems are exact. Note that a US gallon (3.785 L) and an imperial gallon (4.546 L) are different – choose the right one above.
This converter covers 10 categories and 66 units: length, weight, temperature, volume, area, speed, time, data, energy, pressure.
Frequently asked questions
How many liters are in a us gallon?
1 us gallon = 3.7854118 liters.
How do I convert us gallons to liters?
Use the formula L = gal × 3.7854118. For example, 5 gal = 18.927059 L.
How do I convert liters back to us gallons?
1 liter = 0.26417205 us gallons. Use the L to gal converter linked on this page.
Are these conversions exact?
Yes – all factors use the internationally defined values (for example 1 inch = 2.54 cm exactly, 1 pound = 0.45359237 kg exactly). Results are rounded to 8 significant digits for display.