1 US gallon = 3.78541 liters = 4 quarts = 8 pints = 16 cups = 128 fluid ounces. 1 liter = 1,000 ml = 33.814 US fluid ounces. 1 US cup = 236.588 ml. All values here are US customary units; the UK (imperial) gallon is larger at 4.546 liters.
Example: 1 liter is 0.264 US gallons or 4.227 US cups.
One US gallon is 3.785 liters. One imperial (UK) gallon is 4.546 liters.
A liter is about 4.23 US cups.
See also: liters to gallons · gallons to liters · cooking measurement converter