Volume Converter
Convert volume between liters, US gallons, US cups, and milliliters. The form asks for a Value, From, and To, then shows the chosen conversion plus the other supported units as references.
Use this for recipes, beverage sizes, fuel, cleaning products, lab measurements, and container planning. The gallon and cup factors are US customary values, not imperial measures. For single-purpose shortcuts, see the gallons to liters calculator, milliliters to cups calculator, or ounces to milliliters calculator.
How to use this calculator
- Enter a nonnegative volume.
- Choose liters, gallons, cups, or milliliters as the source.
- Choose the target unit.
- Check whether your source uses US, imperial, or metric units.
Conversion formula
The calculator converts through liters.
| Unit | Factor in liters |
|---|---|
| 1 L | 1 |
| 1 gal | 3.78541 |
| 1 cup | 0.236588 |
| 1 mL | 0.001 |
Worked example: 2 gal × 3.78541 = 7.57082 L. In cups, 7.57082 ÷ 0.236588 = 32.000 cups after rounding.
| Common value | Converted value |
|---|---|
| 1 L | 1,000 mL |
| 1 gal | 3.78541 L |
| 1 cup | 236.588 mL |