Volume Converters
How much liquid fits in something — milliliters, cups, quarts and gallons.
Choose a converter
- Milliliters to Ounces mL → fl oz
- Fluid Ounces to Cups fl oz → cup
- Quarts to Gallons qt → gal
- Liters to Gallons L → gal
What volume units measure
Volume units measure how much space a liquid takes up. These pages use US liquid units by default — the ones on American recipes, cartons and fuel pumps — because the UK Imperial gallon and fluid ounce are different sizes. Each page says which one it uses.
Volume units on this site
| Unit | Symbol | Equals in liters |
|---|---|---|
| Liters | L | 1 (base unit) |
| Milliliters | mL | 0.001 |
| US fluid ounces | fl oz | 0.029573529562 |
| US cups | cup | 0.2365882365 |
| US liquid quarts | qt | 0.946352946 |
| US liquid gallons | gal | 3.785411784 |
Every converter here calculates through liters, so a pair and its reverse always agree. The full list of factors and the standards behind them is on the methodology page.