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Litres are the metric unit of volume; US gallons the imperial one. Fuel, water and container sizes cross between them, so this converter turns litres into US gallons and back.
Liters to Gallons Converter: step-by-step worked example
How many US gallons is a 50-litre fuel tank?
- Value
- 50
- Direction
- Litres → US gallons
- 1
Conversion factor (definition)
1 US gallon = 231 in³ = 3.785411784 L (exact)
1 gal = 3.785411784 L = 3.7854 L
- 2
Inverse factor
1 L = 1 ÷ 3.785411784 gal
1 ÷ 3.785411784 = 0.2642 gal
- 3
Conversion
gal → L: × 3.785411784 · L → gal: ÷ 3.785411784
50 L ÷ 3.785411784 = 13.2086 gal
- 4
Check (reverse direction)
Convert the result back with the inverse operation
13.2086 gal × 3.785411784 = 50 L
- US gal13.2086
- L50
- UK gal10.9985
- qt52.8344
Good to know: The imperial (UK) gallon is 4.54609 L — about 20% larger than the US gallon. Check which gallon your source uses.
Liters to Gallons Converter — how it works
The conversion factor
1 US gallon = 3.785412 litres, so 1 litre = 0.264172 US gallons.
| To convert | Do this |
|---|---|
| L → US gal | divide by 3.785412 |
| US gal → L | multiply by 3.785412 |
The UK (imperial) gallon is larger, at 4.546 litres.
Common values
| Litres | US gallons |
|---|---|
| 1 L | 0.26 gal |
| 10 L | 2.64 gal |
| 40 L | 10.57 gal |
| 100 L | 26.42 gal |
Worked example
A 40 L fuel fill is 40 ÷ 3.785412 = 10.57 US gallons. A 5 US gallon water bottle is 5 × 3.785412 = 18.9 L.
Gallons to litres table
| Gallons (US) | Litres |
|---|---|
| 1 | 3.79 |
| 2 | 7.57 |
| 3 | 11.36 |
| 5 | 18.93 |
| 10 | 37.85 |
| 15 | 56.78 |
| 20 | 75.71 |
| 50 | 189.27 |
Litres to gallons table
| Litres | Gallons (US) |
|---|---|
| 1 | 0.26 |
| 5 | 1.32 |
| 10 | 2.64 |
| 20 | 5.28 |
| 40 | 10.57 |
| 50 | 13.21 |
| 60 | 15.85 |
| 100 | 26.42 |
Frequently asked questions
How many US gallons is 1 litre?+
One litre is 0.264172 US gallons — about a quarter of a gallon. Divide litres by 3.785412 to get US gallons.
How do I convert litres to gallons?+
Divide the litre value by 3.785412 for US gallons. For example, 60 L ÷ 3.785412 = 15.85 US gallons.
Is this US or UK gallons?+
US gallons (3.785 L). The imperial (UK) gallon is larger at 4.546 litres — about 20% more — which matters for fuel-economy comparisons.
How do I convert gallons back to litres?+
Multiply US gallons by 3.785412. So 10 gal = 37.85 L.
How many litres in 5 US gallons?+
5 US gallons is 18.93 litres — a common large water-cooler size.
About this page
- Publisher:
- Kalkoro — Teknolojig Bilişim Teknolojileri A.Ş., İstanbul
- Written by:
- Ahmet Tur — Editor (Math, date & time, unit conversion, physics & chemistry, everyday tools)
- Reviewed by:
- Kübra Yıldız — Editor
Parameters come from official sources; the last update date is shown at the bottom of the page.
Spotted a wrong result? Use the "Report a bug" button at the top of the page; every report is reviewed.
How we calculate and our accuracy policy →
Results are for information only. For official matters the relevant authority's calculation prevails.
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