Volume converter
US gallon to Liter Converter
Convert gal to L or reverse with one click. Type a value below for an instant result.
US gallon gal
Liter L
gal → L · runs in your browser, no server
How to convert us gallon to liter
US gallon (gal) and Liter (L) both measure volume. Whether you are studying, traveling, cooking, or working on a project, converting between them should be fast and accurate.
This page converts us gallon to liter — ideal when American or British measurements need to match metric specs, school assignments, or international standards.
The standard relationship used on this page means that 1 us gallon equals 3.78541 L. Enter any number in the calculator — use the swap button to reverse the direction without leaving the page.
1 US gallon is 3.78541 liters — about the size of a large milk jug when comparing fuel or container volumes.
Need liter to us gallon instead? Try our Liter to US gallon converter. liter → gallon
When you'll use this
- Converting US car fuel economy (miles per gallon) into the liters-per-100km figures used almost everywhere else
- Converting an American recipe or drink recipe's gallon-scale yield into liters for metric serving bottles
- Checking a US fish tank or pool's gallon capacity against liter-labeled equipment or chemical dosing instructions
- Converting US paint coverage (gallons per area) into liters for a European-labeled paint can
- Converting a US propane tank or water heater's gallon capacity into liters for an international spec sheet
Practical note
This page is heavily used by anyone comparing US fuel economy figures to the rest of the world's metric standard: a car rated at 30 miles per US gallon needs both a volume conversion (1 gallon = 3.785 liters) and a distance conversion to arrive at the roughly 7.8 L/100km figure used in Europe and most other countries. It also comes up in home and garden contexts — a US propane tank rated at "20 gallons" converts to about 75.7 liters, a figure needed when buying replacement parts or fittings manufactured to metric specifications abroad.
Tips
- This page uses the US gallon (3.78541 liters), which is meaningfully smaller than the old imperial gallon (about 4.546 liters) still referenced in some UK contexts — always confirm which gallon a source means before comparing figures.
- A common US 5-gallon bucket converts to about 18.9 liters — a handy real-world anchor for estimating other gallon-to-liter conversions.
- For fuel economy comparisons, convert gallons to liters first, then combine with a separate distance conversion to get the liters-per-100km figure used outside the US.
Read our full guide: US gallon vs imperial gallon
gal to L conversion table
| gal | L |
|---|---|
| 1 | 3.78541 |
| 2 | 7.57082 |
| 4 | 15.14164 |
| 8 | 30.28328 |
| 16 | 60.56656 |
| 32 | 121.13312 |
| 64 | 242.26624 |
L to gal conversion table
Or click the swap button in the converter to switch from L to gal.
| L | gal |
|---|---|
| 1 | 0.264172 |
| 2 | 0.528344 |
| 4 | 1.056688 |
| 8 | 2.113377 |
| 16 | 4.226754 |
| 32 | 8.453509 |
| 64 | 16.907019 |
Frequently asked questions
How many liters are in 1 us gallon? +
One us gallon equals 3.78541 L. Use the converter above for any value — results are calculated locally with full precision.
How do I convert gal to L? +
Use the formula: L = gal × 3.78541. Enter your value in the calculator and the result appears instantly. Click the swap button to convert L back to gal.
How many us gallons are in 1 liter? +
One liter equals 0.264172 gal. Swap the converter direction to work backwards from L to gal.
What is 10 gal in L? +
10 gal is 37.8541 L. See the conversion table on this page for more common values.
When would I convert us gallon to liter? +
This conversion is useful for cooking measurements, fuel economy context, and liquid packaging. ConvertHub runs entirely in your browser — no data is uploaded to any server.
Is us gallon to liter the same as liter to us gallon? +
They are inverse operations. This page focuses on gal → L with examples and tables for that direction. For L → gal, use our separate liter to us gallon converter page.