How much does one gallon of propane weigh?

One gallon of propane weighs approximately 4.20 pounds, which is consistent with standard measurements for propane. This weight is important for various applications, including determining how much propane can fit in a storage tank and understanding its energy content in relation to cooking or heating usage. The density of propane is about 0.493 grams per milliliter, which converts to the weight given for a gallon. This knowledge is crucial for professionals in industries such as HVAC, culinary services, and any field utilizing propane as a fuel source, ensuring safe and efficient handling and usage.