# What’s the Weight of a Cubic Foot of Water?

A cubic foot of water that is 70 degrees Fahrenheit weighs approximately 62.3 pounds. But when the temperature changes, the weight also does. This is so because the density of water is affected by temperature, and density influences weight. Since cooler water is denser than hot water and weights more per cubic foot when the temperature is below 70 F. Warmer water weighs less per cubic foot than 62.3 pounds.

According to the USGS Water Science School, a gallon of water weighs around 8.33 pounds at 70 degrees Fahrenheit. Multiply the weight of a gallon of water by 7.48 to get the number of gallons in a cubic foot as a starting point. The outcome is the weight of one cubic foot of water.

## A cubic foot of water weighs the same as a cubic foot of ice, right?

Because water molecules expand as they freeze, increasing in volume and decreasing in density, ice contradicts the temperature rule indicated above. Ice floats on water due to this reason. Ice weighs 57.2 pounds per cubic foot as opposed to water at 70 F, which weighs 62.3 pounds per cubic foot. As a result, a cubic foot of ice weighs more than five pounds less than a cubic foot of water.

## Floatability in Water

The Archimedes Principle states that an object’s buoyancy is determined by its weight as well as the volume of water it displaces. For instance, an ocean liner floats because it moves a significant amount of water.

Due to the minerals dissolved in it, saltwater weighs a little bit more per cubic foot than freshwater. As a result, an object that weighs slightly more than freshwater per cubic foot will be negatively buoyant and sink whereas an object that weighs slightly less than saltwater per cubic foot will be positively buoyant and float.

Divers can change their air pressure to increase or decrease their buoyancy. As a result, they can float, sink further into the water, or maintain neutral buoyancy.

## What Makes Us Need Water?

We need water most significantly for our health, but we also utilise it for enjoyment, business, agriculture, and as a source of energy.

It’s crucial to stay hydrated by eating the right foods and drinking the right beverages. Water keeps your body tissues moist, helps lubricate your joints, regulates your body temperature, quenches your thirst, and protects your spine.

Additionally, drinking water prevents you from being dehydrated in hot weather, while exercising, or while ill. Depending on your level of physical activity, if you’re sick, and the weather, you’ll need a different amount of water to keep healthy. Generally speaking, if you drink water to relieve your thirst as soon as you feel thirsty, your daily requirements for water should be met.

## Different Water Bodies

There are numerous types of water bodies, including small and large bodies of water, saltwater, and freshwater.

The largest bodies of water are oceans. The Pacific Ocean is the largest of these, followed by the Atlantic, Indian, Southern, and Arctic Oceans. Seas, such the Mediterranean Sea and Bering Sea, are names for parts of oceans. Straits, bays, and gulfs are other oceanic divisions.

Lakes, like the Great Lakes of North America, are bodies of water that are entirely encircled by land. Rivers and streams are the names for bodies of water that flow across the surface. The Yangtze, Nile, and Amazon rivers are examples of well-known rivers.

Glaciers are ice-covered bodies of water. Glacial ice covers about 10% of the earth’s surface. Surprisingly, nearly 75 percent of the freshwater on the world is contained in this glacier ice.

## Famous Waterbodies

Between Taylor Glacier’s high peaks, Blood Falls in Antarctica spews blood-colored liquid. This is iron-rich water that leaked from a hypersaline lake that was located beneath the glacier. Iron combines with oxygen in the air to produce the waterfall’s blood-red colour.

As you might have guessed, Boiling Lake is a boiling lake. Under the lake, molten lava flows, heating it and forcing hot gas and steam through the water. It’s better to hold off on taking a swim if you happen to be hiking close to a bubbling lake in Morne Trois Pitons National Park.

Three crater lakes on the peak of the Kelimutu volcano make up the Kelimutu Crater Lakes in Indonesia. Despite being right next to one another, they each have unique hues that occasionally shift. These hues are as different from one another as red and green, black and white, and blue and dark chocolate brown.

Misha Khatri
Misha Khatri is an emeritus professor in the University of Notre Dame's Department of Chemistry and Biochemistry. He graduated from Northern Illinois University with a BSc in Chemistry and Mathematics and a PhD in Physical Analytical Chemistry from the University of Utah.