Convert liters to gallons and other volume units instantly.
1 US gallon = 3.78541 liters. 1 UK gallon = 4.54609 liters.
Note: US and UK gallons are different! When converting, always specify which system.
1 liter = 4.23 US cups = 33.81 fl oz.
This calculator is most useful when precision matters: technical specifications, recipe scaling, scientific measurements, or any context where an approximate conversion introduces real risk.
A frequent mistake is converting in the wrong direction — multiplying where the formula requires division, or vice versa. Always verify the direction of conversion: are you converting from the smaller or larger unit?
A UK architect receives a specification from a US client with dimensions in feet and inches. Converting each measurement to millimetres with precision ensures the drawings are accurate — approximate mental conversion would introduce errors that compound across multiple linked dimensions.
1 liter = 0.2642 US gallons (or 0.22 UK gallons).
1 US gallon = 3.785 liters. 1 UK gallon = 4.546 liters.