How Much does a Gallon of Liquid Weigh?

How much a gallon of liquid will weigh depends on what type of liquid it is. A gallon measures volume, meaning it only measures how much. To calculate the weight of that gallon you'd need to set the empty container on a calibrated scale (set it back to zero after the container is on top of it). Then fill the gallon with whichever liquid you would like. Water will weigh less than orange juice and .
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