liters to gallons calculator
Convert liters to US gallons and cubic feet. Formula, worked example, and a reference table for tank capacity and mixing conversions.
Imported tanks, containers, and appliance specs are often rated in liters, but US plumbing, tank sizing, and hardware are measured in gallons. This calculator converts a liter figure into gallons and cubic feet so you can compare a metric spec sheet against a US quote or fixture rating.
How this calculator works
One liter equals 0.264172 US gallons — the inverse of the 3.78541 liters-per-gallon conversion.
Formula: Gallons = Liters × 0.264172. Cubic feet = Liters × 0.0353147.
Worked example
Enter 100 liters, the calculator’s default:
- Gallons: 100 × 0.264172 ≈ 26.417 gal
- Cubic feet: 100 × 0.0353147 ≈ 3.531 cu ft
That’s roughly the size of a small water cooler bottle multiplied several times over — enough for a compact under-sink tank.
Reference
| Liters | Gallons | Cubic feet |
|---|---|---|
| 25 L | 6.604 gal | 0.883 cu ft |
| 100 L | 26.417 gal | 3.531 cu ft |
| 250 L | 66.043 gal | 8.829 cu ft |
| 500 L | 132.086 gal | 17.657 cu ft |
Where this conversion is used
Rain barrels, water tanks, and irrigation reservoirs manufactured overseas are frequently rated in liters, but a US contractor’s quote or hardware-store equivalent will list capacity in gallons. Converting the liter rating to gallons lets you compare apples to apples before you buy. To go the other way — converting a US gallon rating into liters — use the Gallons to Liters Calculator, or size a tank’s total volume from its dimensions with the Tank Volume Calculator.
Frequently asked questions
How many gallons are in a liter?
One liter equals 0.264172 US gallons. Since a US gallon is 3.78541 liters, dividing your liter figure by 3.78541 gives the equivalent in gallons.
Why would I convert liters to gallons?
Imported tanks, containers, and product labels — especially from Europe or Asia — often list capacity or dosing in liters, but US plumbing fixtures, tank specs, and hardware store products are rated in gallons. Converting lets you compare the two directly.
Does this use the US gallon or the imperial gallon?
US gallon (3.78541 L). If you're working with a UK or Commonwealth spec that uses the imperial gallon (4.54609 L), the result from this calculator will be roughly 20% higher than the imperial gallon figure — check the source before assuming which one applies.
How do I convert a liter-rated tank to gallons for a US quote?
Enter the tank's rated liter capacity here to get the gallon equivalent, then use that gallon figure when comparing against US-made tanks or getting a US contractor's quote.
How do I convert gallons back to liters?
Multiply gallons by 3.78541, or use our Gallons to Liters Calculator directly.
Estimates only. Verify quantities with your supplier before purchasing.