Gallons (US) to Liters Converter
1 gal equals 3.7854118 L, and 1 L equals 0.26417205 gal. Enter a value in either box to convert gallons (us) to liters and back. Formula: cubic meters = value x unit factor (1 US gal = 231 in3 = 0.003785411784 m3 exactly; 1 UK gal = 4.54609 L).
· CalcFlow Editorial
1 gal = 3.7854118 L
Results shown are estimates for informational purposes only. Nothing on CalcFlow is financial, tax, legal, or medical advice. Always consult a qualified professional before making important decisions.
Gallons (US) to Liters Conversion Table
| Gallons (US) | Liters |
|---|---|
| 1 gal | 3.7854118 L |
| 2 gal | 7.5708236 L |
| 5 gal | 18.927059 L |
| 10 gal | 37.854118 L |
| 20 gal | 75.708236 L |
| 50 gal | 189.27059 L |
| 100 gal | 378.54118 L |
| 500 gal | 1,892.7059 L |
| 1,000 gal | 3,785.4118 L |
Liters to Gallons (US) Conversion Table
| Liters | Gallons (US) |
|---|---|
| 1 L | 0.26417205 gal |
| 2 L | 0.5283441 gal |
| 5 L | 1.3208603 gal |
| 10 L | 2.6417205 gal |
| 20 L | 5.283441 gal |
| 50 L | 13.208603 gal |
| 100 L | 26.417205 gal |
| 500 L | 132.08603 gal |
| 1,000 L | 264.17205 gal |
Worked example: 10 gal = 37.854118 L. 3 US gallons is 3 x 3.785411784 = 11.356 liters. A 2 liter bottle holds 2 / 0.2365882365 = 8.45 US cups.
Need other units? Open the full Volume Converter.
Popular Volume Conversions
Formula
cubic meters = value x unit factor (1 US gal = 231 in3 = 0.003785411784 m3 exactly; 1 UK gal = 4.54609 L)Understanding Volume Conversion
Volume units come in two families that share names: US customary (gallon, quart, pint, cup, fluid ounce) and British imperial (the same names with different sizes). The US gallon is defined as exactly 231 cubic inches, or 3.785411784 liters. The imperial gallon is exactly 4.54609 liters, about 20 percent larger. Cooking measures such as teaspoons and tablespoons are derived from the US gallon here.
Tips and Best Practices
- 1A US gallon is about 3.785 liters; an imperial gallon is about 4.546 liters. Check which one a recipe or fuel figure means.
- 2One US cup is about 236.6 mL, though nutrition labels round a cup to 240 mL.
- 3For liquids in cooking, 3 teaspoons make 1 tablespoon and 16 tablespoons make 1 US cup.
Real-World Example
3 US gallons is 3 x 3.785411784 = 11.356 liters. A 2 liter bottle holds 2 / 0.2365882365 = 8.45 US cups.
Common Mistakes to Avoid
- Using US gallons for a UK recipe or car fuel figure, which can be off by about 20 percent.
- Assuming a fluid ounce and an ounce of weight are the same; they measure different things.
- Mixing the US pint (473 mL) with the imperial pint (568 mL).
How to Use
- Type a number in the Gallons (US) box.
- The Liters result appears instantly; you can also edit the Liters box to convert backwards.
- Use the swap button to reverse the direction and Copy result to copy the answer.
Frequently Asked Questions
How many liters are in 1 gal?
How many gallons (us) are in 1 L?
What is the formula to convert gallons (us) to liters?
How many milliliters are in a cup?
Sources: NIST Handbook 44 Appendix B (US gallon = 231 cubic inches; tablespoon, teaspoon, cup, pint, quart); UK Weights and Measures Act (imperial gallon = 4.54609 L); 42-gallon petroleum barrel.