Enter a volume in any unit to convert it to liters, gallons, cubic feet, and more.
How to Use the Volume Unit Conversion Calculator
Pick the unit the volume is currently in, enter the value, and the other six units update together.
1 US gallon = 3.785411784 liters
1 liter = 1,000 mL = 1,000 cm³
1 US gallon = 4 US quartsVolume conversion trips people up more than length or area because the units come from three unrelated systems layered on top of each other — metric (liters, cubic meters), US customary cooking and fuel measures (gallons, quarts), and pure geometric units (cubic feet, cubic inches) that don't reference either. A US gallon and an Imperial gallon aren't even the same size (imperial runs about 20% larger), which is exactly the kind of mismatch this calculator sidesteps by sticking to one consistent, clearly labeled set of units.