US gallons to liters
1 US gallon = 3.78541 liters
Type a value in US gallons (gal) to get liters (L) straight away. A US gallon is larger than a liter, so the number goes up. Both units belong to volume, measured here against the liter.
1 gal = 3.7854118 L
Formula
L = gal × 3.7854118
One US gallon is 3.7854118 liters, so multiply the US gallon value by that factor. Here gal is the value in US gallons and L is the result in liters.
Worked example: 5 US gallons × 3.7854118 = 18.9271 liters.
US gallons to liters table
| US gallons (gal) | liters (L) |
|---|---|
| 1 gal | 3.78541 L |
| 2 gal | 7.57082 L |
| 3 gal | 11.3562 L |
| 4 gal | 15.1416 L |
| 5 gal | 18.9271 L |
| 6 gal | 22.7125 L |
| 7 gal | 26.4979 L |
| 8 gal | 30.2833 L |
| 9 gal | 34.0687 L |
| 10 gal | 37.8541 L |
| 15 gal | 56.7812 L |
| 20 gal | 75.7082 L |
| 25 gal | 94.6353 L |
| 30 gal | 113.562 L |
| 40 gal | 151.416 L |
| 50 gal | 189.271 L |
| 60 gal | 227.125 L |
| 75 gal | 283.906 L |
| 100 gal | 378.541 L |
Everyday US gallons in liters
| What it is | gal | L |
|---|---|---|
| a milk jug (US) | 1 gal | 3.78541 L |
| a water-cooler bottle | 5 gal | 18.9271 L |
| a compact car tank (about) | 13 gal | 49.2104 L |
| an SUV tank (about) | 20 gal | 75.7082 L |
| a standard oil drum | 55 gal | 208.198 L |
Quick estimate in your head
Multiply by about 3.8. For 5 gal that gives 19 L against an exact 18.9271 L, an error of 0.4%.
Watch out for
- A US gallon (3.785 L) is about 17% smaller than a UK gallon (4.546 L). Check which one a car manual or recipe means.
About the units
US gallon (gal). The US liquid gallon, exactly 231 cubic inches or about 3.785 L. Used for fuel in the US.
Liter (L). 1,000 cm³, one cubic decimeter. Used for fuel, milk and water.
Going the other way, 1 liter is 0.264172 US gallons.
Questions
How many liters are in 1 US gallon?
1 US gallon is 3.78541 liters, and 1 liter is 0.264172 US gallons.
How do I convert US gallons to liters?
Use L = gal × 3.7854118. For example, 5 US gallons × 3.7854118 = 18.9271 liters.
Are US and UK measures the same?
No. This page uses US customary units. A UK gallon is 4.546 L against 3.785 L in the US, and a UK pint is 568 mL against 473 mL.
How much is a standard oil drum in liters?
55 gal is 208.198 L.
Source for the conversion factor: NIST Handbook 44, Appendix C (units of volume).
Related conversions
- liters to US gallons
- liters to UK gallons
- UK gallons to liters
- liters to milliliters
- milliliters to liters
- cubic meters to liters