Gallons to Liters
Convert gallons to liters instantly — multiply the US gallons by 3.785. Type in either box to convert both ways. Useful for fuel economy, aquariums and large recipes when a volume is given in US gallons but you need liters.
Gallons to Liters conversion table
| Gallons (US gal) | Liters (L) |
|---|---|
| 1 US gal | 3.78541 L |
| 2 US gal | 7.57082 L |
| 5 US gal | 18.9271 L |
| 10 US gal | 37.8541 L |
| 15 US gal | 56.7812 L |
| 20 US gal | 75.7082 L |
| 50 US gal | 189.271 L |
| 100 US gal | 378.541 L |
How to convert gallons to liters
To convert gallons to liters, multiply the US gallons by 3.785. For example, 1 US gal equals 3.78541 L. The calculator above runs the exact factor at full precision and updates as you type, and the swap button flips the direction so you can go from liters back to gallons just as quickly.
Frequently asked questions
How do you convert gallons to liters?
To convert gallons to liters, multiply the US gallons by 3.785. For example, 1 US gal is 3.78541 L. The calculator above does this for you the moment you type — enter a value on the left and the liters result appears on the right, and you can type in either box to convert in the opposite direction. Every result uses the exact internationally defined factor, not a rounded shortcut, so the numbers are accurate enough for schoolwork, cooking, travel and engineering alike.
How many liters are in 1 US gal?
There are 3.78541 L in 1 US gal. The conversion table on this page lists the most common values — 1 US gal is 3.78541 L, and the table continues up to 100 US gal = 378.541 L — so you can read off everyday amounts at a glance without typing anything.
Is this US gal to L converter accurate?
Yes. It uses the precise, internationally agreed conversion factor rather than a rounded approximation, and the math runs at full double precision in your browser, with results shown to six significant figures. Useful for fuel economy, aquariums and large recipes when a volume is given in US gallons but you need liters.
Is the gallons to liters converter free?
Yes — it is completely free with no sign-up and no limits, and every calculation happens locally in your browser, so nothing you type is uploaded or stored. For other units, the full LK Forge unit converter covers length, weight, temperature, volume and speed in one place.
More conversions
Kilograms → PoundsPounds → KilogramsCentimeters → InchesInches → CentimetersKilometers → MilesMiles → Kilometers All units →