Gallons (US) to Liters Converter
Convert gallons (US) (gal) to liters (L) instantly. Type a value above and the result updates while you type. 1 gallon (US) equals 3.78541 liters.
Result updates as you type. Values are calculated locally in your browser — nothing is sent to a server.
The formula
1 gallon (US) = 3.78541 liters
Multiply the gallons (US) value by 3.78541 to get liters. Or divide by 0.264172 to go the other way.
Gallons (US) to liters conversion table
| gal | L |
|---|---|
| 1 | 3.78541 |
| 2 | 7.57082 |
| 3 | 11.3562 |
| 4 | 15.1416 |
| 5 | 18.9271 |
| 6 | 22.7125 |
| 7 | 26.4979 |
| 8 | 30.2833 |
| 9 | 34.0687 |
| 10 | 37.8541 |
| 15 | 56.7812 |
| 20 | 75.7082 |
| 25 | 94.6353 |
| 50 | 189.271 |
| 75 | 283.906 |
| 100 | 378.541 |
Worked examples
- 5 gal × 3.78541 = 18.9271 L
- 30 gal × 3.78541 = 113.562 L
- 165 gal × 3.78541 = 624.593 L
Conversion factors follow the exact international definitions (SI/BIPM; imperial units per the 1959 International Yard and Pound Agreement, maintained by NIST). NIST unit conversion reference
Factors last verified August 2026 · Built by Jeffrey Tepper.
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Frequently asked questions
How many liters are in 1 gallon (US)?
1 gallon (US) equals 3.78541 liters (gal → L).
How do you convert gallons (US) to liters?
Multiply the number of gallons (US) by 3.78541. For example: 10 gal × 3.78541 = 37.8541 L.
What is 50 gal in L?
50 gal equals 189.271 L.
Which is bigger: 1 gallon (US) or 1 liter?
1 gallon (US) is bigger: it equals 3.78541 liters.