Convert Gallon (US) to litres
Western Europe · UK vs US Volume · active · modern
Conventional value The unit is customary but its modern value is settled and widely cited; the arithmetic itself is exact.
1 Gallon (US) = 3.78541 litres
litres = Gallon (US) × 3.78541
Convert any amount
Gallon (US) to litres table
| Gallon (US) | litres |
|---|---|
| 0.25 Gallon (US) | 0.946353 litres |
| 0.5 Gallon (US) | 1.89271 litres |
| 1 Gallon (US) | 3.78541 litres |
| 2 Gallon (US) | 7.57082 litres |
| 3 Gallon (US) | 11.3562 litres |
| 4 Gallon (US) | 15.1416 litres |
| 5 Gallon (US) | 18.9271 litres |
| 10 Gallon (US) | 37.8541 litres |
| 20 Gallon (US) | 75.7082 litres |
| 25 Gallon (US) | 94.6352 litres |
| 50 Gallon (US) | 189.27 litres |
| 100 Gallon (US) | 378.541 litres |
About the Gallon (US)
US gallon = 3.785 liters.
- Symbol
- gal US
- Value in SI
- 1 Gallon (US) = 3.78541 litre
- Typical use
- general
- Source
- UnitConvertLab measurement atlas
Every atlas conversion routes through the SI litre. See our methodology and data provenance pages for how these values are sourced and verified.
Related units and variant risk
Other uk vs us volume units in the Western Europe family, least settled first. If your figure came from a land record, invoice or historical document rather than a calculator, check these before assuming a single standard.
- Gill (UK) to litresHistorically reconstructed
- Teaspoon (Metric) to litresConventional value
- Tablespoon (Metric) to litresConventional value
- Cup (UK/Imperial) to litresConventional value
- Cup (Metric) to litresConventional value
- Fluid Ounce (UK) to litresConventional value
- Gallon (UK) to litresConventional value
- Pint (UK) to litresConventional value
Related conversions
Frequently asked
How many litres are in a Gallon (US)?
1 Gallon (US) = 3.78541 litres. Multiply the number of Gallon (US) by 3.78541 to get litres.
What is Gallon (US) used for?
US gallon = 3.785 liters. It is classified as active and dates from the modern period.
Is the Gallon (US) value exact?
Yes for practical purposes. UnitConvertLab converts every atlas unit through the SI litre, so the arithmetic itself introduces no rounding beyond the digits shown.
How reliable is this Gallon (US) conversion?
Conventional value — The unit is customary but its modern value is settled and widely cited; the arithmetic itself is exact. Source: UnitConvertLab measurement atlas.
Cite this page
UnitConvertLab. (2026). Convert Gallon (US) to litres. UnitConvertLab. Retrieved from https://unitconvertlab.com/regional/gallon-us-to-liter
Report an incorrect value or source
Regional units vary by district and by century. If this figure, its variant list or its citation is wrong where you are, tell us — the report carries the page context automatically.