To estimate the mass of 1 gallon of water in kilograms, we first need to know the volume of a gallon. In the United States, 1 gallon is approximately equal to 3.785 liters.
Water has a density of about 1 kilogram per liter at room temperature. Consequently, the mass of water can be calculated using the formula:
Mass (kg) = Volume (liters) × Density (kg/liter)
Substituting in our values:
Mass = 3.785 liters × 1 kg/liter = 3.785 kg
Therefore, the estimated mass of 1 gallon of water is approximately 3.785 kg.