What is the weight of a cubic foot of water?

The weight of a cubic foot of water is 62.5 pounds. This value is derived from the density of water, which is approximately 62.4 pounds per cubic foot at a temperature of 39.2 degrees Fahrenheit (4 degrees Celsius), where water is at its maximum density. For practical purposes, this is often rounded to 62.5 pounds, especially in fire service calculations where ease of use and standardization are essential for determining water supply requirements and pump operations. Knowing the weight of water is crucial for pump operators because it helps in understanding the volume of water they are moving, managing water supply logistics, and ensuring that apparatus and equipment can handle the weight appropriately without exceeding mechanical limits.