UnitSnapUS Gallons to Liters
1 gal = 3.785412 L
US gallons to liters is used by anyone translating American quantities for an international audience: fuel economy and tank sizes, milk jugs, pool and tank volumes, and recipe batches. It is also common in import and export paperwork where liters are required.
When you need to convert US gallons to liters
- Converting a US vehicle fuel tank size for a metric spec sheet
- Labeling or exporting American products sold by the gallon
- Dosing pool or pond chemicals with instructions written in liters
- Scaling up home-brewing batches measured in gallons
How to convert US gallons to liters
L = gal × 3.785412
Example: 5 gal = 18.92706 L
Common volumes
| US Gallons (gal) | Liters (L) |
|---|---|
| 0.5 gal | 1.892706 L |
| 1 gal | 3.785412 L |
| 2 gal | 7.570824 L |
| 5 gal | 18.92706 L |
| 10 gal | 37.85412 L |
| 15 gal | 56.78118 L |
| 20 gal | 75.70824 L |
| 50 gal | 189.2706 L |
| 100 gal | 378.5412 L |
| 1,000 gal | 3,785.412 L |
Tips for converting US gallons to liters
- One US gallon is exactly 3.785411784 liters. Multiplying by 3.8 is within about 0.5% and easy to do in your head.
- Rounding a gallon to 4 liters overstates the volume by about 6%, which adds up on large tanks.
- If the source is British or older Canadian, it may mean the imperial gallon (exactly 4.54609 L) instead.
US Gallons to Liters conversion table
| US Gallons (gal) | Liters (L) |
|---|---|
| 1 gal | 3.785412 L |
| 2 gal | 7.570824 L |
| 3 gal | 11.35624 L |
| 4 gal | 15.14165 L |
| 5 gal | 18.92706 L |
| 6 gal | 22.71247 L |
| 7 gal | 26.49788 L |
| 8 gal | 30.28329 L |
| 9 gal | 34.06871 L |
| 10 gal | 37.85412 L |
| 15 gal | 56.78118 L |
| 20 gal | 75.70824 L |
| 25 gal | 94.63529 L |
| 30 gal | 113.5624 L |
| 40 gal | 151.4165 L |
| 50 gal | 189.2706 L |
| 75 gal | 283.9059 L |
| 100 gal | 378.5412 L |
| 250 gal | 946.3529 L |
| 500 gal | 1,892.706 L |
| 1,000 gal | 3,785.412 L |
About the units
US Gallons: The US gallon is a unit of volume equal to 231 cubic inches, or exactly 3.785411784 liters, used for fuel and milk in the United States.
Liters: The liter is a metric unit of volume equal to one cubic decimeter (1,000 cubic centimeters), used for drinks, fuel and containers.
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Frequently asked questions
How many liters are in 1 US gallon?
1 US gallon equals 3.785412 liters.
How many US gallons are in 1 liter?
1 liter equals 0.2641721 US gallons.
How do I convert US gallons to liters?
Use the formula L = gal × 3.785412.
What is 10 US gallons in liters?
10 US gallons equals 37.85412 liters.
Related conversions
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- Imperial Gallons to Liters
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- Imperial Gallons to US Gallons
- Milliliters to US Fluid Ounces
- US Fluid Ounces to Milliliters
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- Cubic Meters to Cubic Feet
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Factors: NIST SP 811 · SI Brochure · NIST Handbook 44 — Updated