What are the dimensions a gallon of water?

A gallon of water has a volume of 128 fluid ounces, which is equivalent to approximately 3.785 liters. In terms of dimensions, a gallon of water typically occupies a space of about 231 cubic inches or 3.785 cubic decimeters. The actual dimensions can vary based on the container, but a standard gallon jug is usually about 6 inches in diameter and around 11 inches tall.