US gallons to litres – convert US gal to L
Convert US gallons to litres (US gal to L) for fuel, water storage, brewing, recipes and more. This page opens the main volume converter with US gal → L pre-selected.
Open the interactive US gal → L converter:
Use main converter (US gal → L) or switch to L → US galYou can also compare US gallons with UK gallons, cubic feet and cubic metres on the homepage.
Quick reference: US gallons to litres
1 US gallon ≈ 3.78541 L. Some examples:
| US gallons (US gal) | Litres (L, approx.) |
|---|---|
| 1 US gal | 3.79 L |
| 2 US gal | 7.57 L |
| 5 US gal | 18.93 L |
| 10 US gal | 37.85 L |
| 20 US gal | 75.71 L |
| 50 US gal | 189.27 L |
Why convert US gallons to litres?
Typical reasons:
- Reading US fuel economy or tank capacity figures in a metric country.
- Scaling recipes or brewing guides that use US gallon measures.
- Planning storage tanks, rain barrels or aquariums.
- Comparing US and European product specifications.
More volume converters on this site
US gallons to litres FAQ
What is the formula for US gallons to litres?
Multiply US gallons by 3.78541. Example: 12 US gal × 3.78541 ≈ 45.43 L.
Is a US gallon the same as an imperial gallon?
No. An imperial (UK) gallon is larger, about 4.546 L. This page deals with US liquid gallons only.
Why do some manuals not say whether it’s a US or UK gallon?
Older or ambiguous documents can be unclear. Car fuel and US domestic products usually mean US gallons; UK products usually mean UK gallons.
Page last updated: 2 December 2025.