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One US gallon of water weighs around 8.33 pounds or 3.78 kilograms at room temperature. The precise weight of water varies according to its level of density, which in turn depends on its storage temperature.
To calculate the weight of a gallon of another liquid, you can use our gallons to pounds converter. How much does 1 liter of water weigh? One liter of water at room temperature (70°F / 21°C) weighs approximately 1 kilogram (35.2 ounces or 2.2lb).
How much does water weigh? This calculator will determine the weight of a certain volume of water in U.S. customary units.
A gallon of water weighs approximately 8.34 pounds at 39.2 degrees Fahrenheit (4 degrees Celsius). The weight of a gallon of water varies with temperature because it affects how water molecules are packed together within a certain volume.
How Much Does a Gallon of Water Weigh? A gallon of water weighs 8.34 pounds, which is equivalent to 3.785 kilograms. This weight is constant regardless of the temperature at which the water is measured and the location where it is measured.
So, just how much does a gallon of water weigh? One gallon of water weighs between 8.288489 and 8.345404 pounds (lb), depending on the temperature. The table below shows the weight at various temperatures.
Put simply, a gallon of water weighs about 8.34 pounds (3.78 kilograms). However, since gallons are a measure of volume rather than weight, the actual weight of a gallon of water will depend on temperature, surface gravity, height, and pressure.
This calculator uses the density of water at 20° Celsius, which is 0.9982071 grams per cubic centimeter. The weight of a certain volume of water could vary slightly depending on the temperature.
Steps to calculate the weight of a gallon of water: Step 1: The volume is the volume of one gallon of water, and the density of water is approximately 8.34 pounds per gallon (at room temperature). Step 2: The formula for the weight of a gallon of water is then: Weight = 1 gallon × 8.34 pounds/gallon.
You can use our volume converter for this if you need to. Or, if your volume of water is in gallons, you can convert to liters here. The Water Weight Calculator helps you estimate the weight of water based on volume and temperature, supporting both US and UK units.