Gallons (US) to Milliliters converter
Convert gallons (us) (gal) to milliliters (mL) — results update instantly as you type.
Gallons (US) to Milliliters
1 gal = 3,785.411784 mL
How to convert Gallons (US) to Milliliters
Volume conversions appear constantly in cooking, fuel, and science. The metric system uses milliliters and liters, while the US uses cups, pints, quarts, and gallons — and the UK gallon is a different size entirely.
All units convert through the liter. One US gallon is exactly 3.785411784 liters, while a UK (imperial) gallon is 4.54609 liters — about 20% larger. One cubic meter equals exactly 1,000 liters.
Formula
gal × 3,785.411784 = mL
Multiply your gallons (us) value by 3,785.411784 to get milliliters. For the reverse, divide by the same factor.
Gallons (US) to Milliliters conversion table
| Gallons (US) | Milliliters |
|---|---|
| 1 gal | 3,785.411784 mL |
| 2 gal | 7,570.823568 mL |
| 5 gal | 18,927.05892 mL |
| 10 gal | 37,854.11784 mL |
| 25 gal | 94,635.2946 mL |
| 100 gal | 378,541.1784 mL |
Common use cases
- Recipes between cups, milliliters, and fluid ounces
- Fuel and liquid purchases between gallons and liters
- Water tanks and pools in cubic meters
- Beverage servings in pints vs half-liters
Frequently asked questions
One US gallon equals exactly 3.785411784 liters. A UK imperial gallon is larger at 4.54609 liters.