Water has a variable weight and it is determined solely by the temperature of its content. That might seem to be a little awkward but you have to deal with it. Its water whose properties alter this ability. And this is what keeps the marine animals alive in the lake even if the surface of the lake is frozen. So, let us find out **how much does a gallon of water weigh?**

**That is a Big Weight**

We first have to convert that huge amount of water to a normal grade weighing medium and then do our calculations.

Mostly, the gallon is an uncommon unit and does weigh in with KG and grams that efficiently. So we will use a metric method and a unit.

We will be using kilograms to find out how much does a gallon of water weighs.

But we will first convert to a more efficient liquid unit. Like a Litre.

**Gallons to Litre**

Gallon is around 4 times as big as a Litre, but the exact value is 3.785411784. This number of times is a gallon bigger than a Litre. Pretty huge.

So if a gallon is just concerned, 1 gallon is therefore equal to 3.7854 liters of water.

We do know that 1L of water weighs nearly a Kilogram on normal conditions. Or roughly. But a Litre of water weighs 1 KG only at exactly 4 degrees C.

Let us take the temperature of the water that we will be using is around 4 degrees C.

So, it will weigh a kilogram for a single L.

And 1 gallon is equal to 3.78541 L.

So, 1 gallon of water will weigh around 3.785411 Kg.

Simple.

**How Many Pounds Does a Gallon of Water Weigh**

Pounds is another great unit for making things more complicated when you don’t have a calculator. But we will use this for the convention. One gallon is equal to 8.345655 pounds. And the similar water at 4 degrees C will weigh around 8.345 pounds. As the weight basis is the same when the temperature is down at 4.

So, how much does a gallon of water weigh? 8.34 pounds

**How Much Does a Gallon of Water Weigh-in Pounds**

A gallon of water will weigh the same amount as it will do with other weights. The density of water does change with the lower temperature when it is spiked up. And keeping this in mind, we should also know that density changes with temperature for water. It only remains stable at 4 degrees C and attains the most volume that is possible in the liquid state. So, in that state, it weighs around 8.34 pounds. That is the weight of 1 gallon of water.

**How Much Does a 5-Gallon jug of Water Weigh**

We do know how much 1 gallon weighs. So we can multiply that weight with anything for a bigger getting the bigger weights in terms of gallons. So, how much does a 5-gallon jug of water weigh? Simple. 1 gallon weighs 8.34 pounds or 3.785411 kg. So we multiply that by five and get either 41.7 pounds or 18.927055 KG.

Water is one of the most loved liquids by the scientists as due to its incredible properties and features that make is quite usable in almost any field. But we have to make ourselves clear with these properties else we cant measure water in any sense. Even in gallons and pounds.

So, how much does a gallon of water weigh? 3.785411 kg or 8.34 pounds.