ConvBolt — Unit ConverterUS gallons to Liters Converter
Converting US gallons to liters is a multiplication by a fixed factor: 1 gal = 3.785412 L. The table below covers the values people look up most often, and the formula section shows exactly where that factor comes from.
Because one us gallon works out to 3.785412 L, the liter is the larger unit of the two: a figure given in liter always carries a larger number than the same measurement in us gallon. A chart drawn in gal can hide that, so check which label the axis uses before you compare two readings.
When a container size is certified in liters but you are dosing in US gallons, it pays to convert from the certified figure rather than from a rounded label.
The conversion factor used here is 3.785412 L per us gallon (6 significant digits as shown). Kept to seven figures it covers professional measurement; if you round it to two or three decimals for a spreadsheet, the error scales with the input — at a value of 1,000 gal a factor rounded to three decimals can be off by a measurable amount. The reverse direction uses 0.2641721 gal per L, the exact reciprocal, so a round trip through both pages returns your original number.
US gallons to Liters formula
Use this formula to convert any us gallon value to liters:
Worked example: 100 gal × 3.785412 = 378.5412 L.
US gallons to Liters conversion table
| 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 |
| 20 gal | 75.70824 L |
| 50 gal | 189.2706 L |
| 100 gal | 378.5412 L |
| 500 gal | 1892.706 L |
| 1000 gal | 3785.412 L |
How to convert US gallons to liters
Multiply the us gallon value by 3.785412 to get the equivalent in liters. This single factor works for every value in the table above and for anything else you need — there is no per-value adjustment, which is why a conversion table and a calculator always agree.
If you need the opposite direction, use the Liters to US gallons converter instead of dividing by hand; both pages use the same source factors. For every other gal conversion in one place, see the gal conversion hub.
Frequently asked questions
How many liters are in 1 us gallon?
1 us gallon = 3.785412 L.
What is 100 US gallons in liters?
100 gal = 378.5412 L.
Is converting US gallons to liters the same as liters to US gallons?
No — the direction changes the multiplier. The reverse conversion (1 L = 0.2641721 gal) is on the Liters to US gallons page.
Related conversions
Try the ConvBolt Unit Converter for any other volume unit, browse the Volume conversions, or read our conversion guides.