US Liquid Gallons to Liters Converter
Convert US liquid gallons to liters instantly with this free US liquid gallons to liters converter. Enter any value to get an accurate volume conversion, plus the formula, the conversion factor and a full reference table.
What is 1 US liquid gallon in liters?
1 US liquid gallon is equal to 3.78541178 liters.
1 × 3.78541178 = 3.78541178 liters
1 US liquid gallon = 3.785411784 liters
US liquid gallons to Liters formula
L = gal × 3.78541178
The US liquid gallons to liters conversion factor is 3.785411784, which is exact by definition. 1 US liquid gallon = 3.785411784 liters, and 1 liter = 0.264172052358 US liquid gallons.
Regional note. Gallons differ by region. A US liquid gallon is exactly 3.785411784 liters; an Imperial (UK) gallon is exactly 4.54609 liters — about 20% larger. This page uses the US liquid gallon.
Worked examples
- 2 US liquid gallons = 7.57082357 liters — 2 × 3.78541178 = 7.57082357 liters
- 6 US liquid gallons = 22.7124707 liters — 6 × 3.78541178 = 22.7124707 liters
- 10 US liquid gallons = 37.8541178 liters — 10 × 3.78541178 = 37.8541178 liters
US liquid gallons to Liters conversion table
Every value below is calculated with the exact conversion factor and rounded for display.
| US liquid gallons (gal) | Liters (L) |
|---|---|
| 1 gal | 3.7854118 L |
| 2 gal | 7.5708236 L |
| 3 gal | 11.356235 L |
| 4 gal | 15.141647 L |
| 5 gal | 18.927059 L |
| 6 gal | 22.712471 L |
| 7 gal | 26.497882 L |
| 8 gal | 30.283294 L |
| 9 gal | 34.068706 L |
| 10 gal | 37.854118 L |
| 12 gal | 45.424941 L |
| 15 gal | 56.781177 L |
| 20 gal | 75.708236 L |
| 25 gal | 94.635295 L |
| 30 gal | 113.56235 L |
| 50 gal | 189.27059 L |
| 75 gal | 283.90588 L |
| 100 gal | 378.54118 L |
| 500 gal | 1,892.7059 L |
| 1,000 gal | 3,785.4118 L |
When you need to convert US liquid gallons to liters
- Scaling recipes between metric millilitres and US cups, pints or fluid ounces.
- Comparing fuel prices and tank capacities between countries.
- Working out paint, fertiliser or pool chemical quantities from instructions written for another market.
Getting a feel for the scale
A converted number is easier to trust when you can picture it. These reference points let you sanity-check the result at a glance.
US liquid gallon (gal)
- A US milk jug is 1 gallon
- A mid-size car tank holds 12–16 US gallons
Liter (L)
- A large water bottle is 1 L
- A standard wine bottle is 0.75 L
Mental shortcut
Multiply by 4 and subtract 5%. 10 gal → 38 L (exact 37.85).
Common mistakes to avoid
- Dividing when you should multiply. Because 1 US liquid gallon = 3.78541 liters, the answer should be larger than the number you started with.
- Mixing US and Imperial liquid measures. The Imperial gallon and pint are about 20% larger than their US counterparts, which is enough to ruin a recipe or misstate fuel economy.
- Rounding too early. Convert first at full precision, then round the final answer to the precision the task actually needs.
How precise does the answer need to be?
Cooking tolerates rounding to the nearest 5 mL or quarter cup. Dosing, chemistry and pool treatment do not — keep the full converted value there.
How these units are defined
- US liquid gallon (gal): Exactly 3.785411784 liters — the gallon used in the United States. This unit's relationship to the SI base unit is exact by definition, so no rounding enters the conversion factor.
- Liter (L): 1,000 cubic centimeters; the everyday metric volume unit. This unit's relationship to the SI base unit is exact by definition, so no rounding enters the conversion factor.
Related conversions
- Liters to US liquid gallons
- US liquid gallons to Milliliters
- US liquid gallons to Cubic meters
- US liquid gallons to Cubic feet
- US liquid gallons to US teaspoons
- US liquid gallons to US tablespoons
- US liquid gallons to US fluid ounces
- US liquid gallons to US cups
- US liquid gallons to US liquid pints
- US liquid gallons to US liquid quarts
- US liquid gallons to Imperial pints
- US liquid gallons to Imperial gallons
Frequently asked questions
- What is 1 US liquid gallon in liters?
- 1 US liquid gallon is equal to 3.78541178 liters.
- How many US liquid gallons are in one liter?
- There are 0.264172052 US liquid gallons in 1 liter.
- How do you convert US liquid gallons to liters?
- Multiply the number of US liquid gallons by 3.78541178 — or use the formula L = gal × 3.78541178.
- What is 6 US liquid gallons in liters?
- 6 US liquid gallons is 22.7124707 liters. 6 × 3.78541178 = 22.7124707 liters.
- Is the US liquid gallons to liters conversion exact?
- Yes. The relationship is fixed by definition, so 3.785411784 is an exact conversion factor — only the displayed result is rounded.
- Does this use US or Imperial liters?
- Gallons differ by region. A US liquid gallon is exactly 3.785411784 liters; an Imperial (UK) gallon is exactly 4.54609 liters — about 20% larger. This page uses the US liquid gallon.