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Density is calculated as mass per unit volume, so to find the density in pounds per gallon, you would divide the weight (mass) of a gallon of water (9.4 pounds) by the volume of a gallon (1 gallon). Therefore, the density of water in pounds per gallon is 9.4 pounds.
At a density of 1.73 kg per liter, there are approximately 7.59 pounds in one gallon. This can be calculated by converting the density to pounds per liter (1 kg = 2.20462 lbs) and then multiplying by the number of liters in a gallon (approximately 3.785).
The conversion of diesel from pounds to gallons depends on the density of the diesel fuel, which can vary. On average, diesel fuel has a density of about 7.1 pounds per gallon. Therefore, to convert pounds of diesel to gallons, you would divide the number of pounds by 7.1.
One gallon of nonfat milk weighs approximately 8.6 pounds.
That depends on how much you have! A tanker full of the stuff weighs more than a gallon of it. What you probably meant to ask is how much it weighs per unit volume. In other words, you wish to know its density. The specific gravity of gasoline is about 0.72. That is, it's about 72 percent the density of water. Since a gallon of water weighs 8.34 pounds per gallon, we can easily calculate the density of gas as 6.00 pounds per gallon. By the way, I say "about" above because the density of gasoline varies with temperature.