Initially, the ideal weight of water was defined as 2.20 pounds (1kg/liter). This definition was later discarded since water’s weight is affected by atmospheric pressure and temperature changes.
So, what does a gallon of water weigh in pounds? A gallon in the U.S. weighs 8.34 pounds, while that in the U.K. weighs 10.02 pounds.
However, it is important to note that this answer comes with a caveat. The weight of water fluctuates with changes in temperature.
What's in this Guide?
- How Does Temperature and Atmospheric Pressure Affect the Weight of Water?
- What Does a Gallon of Water Weigh When Frozen?
- How Much Do 5 Gallons of Water Weigh in Pounds?
How Does Temperature and Atmospheric Pressure Affect the Weight of Water?
As aforementioned, the weight of water fluctuates with temperature and atmospheric pressure. When the temperature of the water rises, the energy of the water increases and vice versa.
Molecules cause the weight fluctuation in the water. When these molecules expand, the density of the water lowers.
You could argue that the water gets thinner with an increase in temperature.
Atmospheric pressure and gravity affect the weight of water as well. The gravitational pull and atmospheric pressure are greater on earth than on the moon.
Therefore, a gallon of water weighs more on earth than on the moon.
What Does a Gallon of Water Weigh When Frozen?
Although liquid water and frozen water have different names and several different properties, the weight does not change.
A gallon of frozen water weighs 8.34 pounds, just like liquid water.
How Much Do 5 Gallons of Water Weigh in Pounds?
If you are measuring the weight of your water using the U.S. gallon, the weight of 5 gallons would be (5 x 8.34) = 41.7 pounds.
If using the Imperial gallon, the weight of 5 gallons will be equivalent to; (5 x 10.02) = 50.1 pounds.
Q: How much does a gallon of water weigh in lbs?
A U.S. gallon of water weighs about 8.34 lbs. An imperial (U.K.) gallon of water weighs a little more at 10.02 lbs.
Q: What does lbs stand for?
Lbs stands for pounds. It is an ancient Roman unit of measurement, Libra pondo.
Libra pondo is a Latin phrase that translates to pound by weight.
Q: How many kg mean lbs?
One pound equals 0.453 kg.
Q: How much does a 5 lb gallon of water weigh?
A 5 lb gallon of water equals 5 pounds or 2.268 kg.
Q: How much do 100 gallons of water weigh in pounds?
1 U.S. pound equals 8.34 pounds.
100 U.S pounds = (100 x 8.34) = 834 pounds.
100 gallons of water equals 834 pounds. However, it’s important to note that the weight might increase or decrease with changes in temperature and density.
Q: How much does a liter of water weigh in pounds?
A liter of water equals 2.205 pounds.
Q: How heavy is a gallon of milk?
A gallon of milk in the U.S. weighs around 8.6 pounds. In the U.K., a gallon of milk weighs approximately 10.3 pounds.
Milk contains saturated fats that make it a little heavier than water.