Water is an essential element in life. We need it to survive, we need it to grow food, and we need it for lots of other things. Because of this, there are many ways to use water efficiently.

One way is by knowing how much water you use every day, and altering your habits to reach your goal of how much water to **drink per day**. For example, if you aim for eight 8-*oz glasses per day*, you can achieve this by having two large bottles of water with a lid and two extra cups with water in the morning, one large bottle of water at lunch with a salad, and two more cups at dinner with food.

Calculating how much water you use can be hard though. Does someone who **takes three showers** a day use more water than someone who takes one? How much does the **shower head leak**? These are questions that must be answered to know the true amount of water used.

## Eight ounce glass sizes

When discussing how many glasses are in a gallon, most people refer to the **standard eight ounce glass size**. These glasses can be referred to as wine glasses, water glasses, coffee cups, tea cups, and even juice cups.

Most of these *containers hold approximately eight ounces* of liquid. Some may hold more or less liquid depending on the substance they are filled with. For example, a *juice cup may fill half* of a gallon with juice, thus reducing the number of gallons you can make with eight ounce glasses.

Others may be slightly larger or smaller than an eight ounce glass as well. The key is to find containers that hold about eight ounces of liquid and then collect enough of them to make one gallon!

You can **also use bottles instead** of glass containers. A standard bottle is about twenty-two ounces so you would need about five bottles to make one gallon. Other bottle sizes you could use are sixteen and ten ounces to still get close to one gallon.

## Fourteen ounce glass sizes

Next up is the fourteen ounce glass size. This is a typical standard soda or drinking glass size. Fourteen ounces is equal to **four eight ounce glasses**, or two twelve ounce glasses.

So, if you were to fill a gallon jug with fourteen ounce glasses, you would have about three and a half gallons of liquid. This would make for a pretty big gallon, so make sure you check your math!

Thirteen ounce glass sizes

The next size down is the thirteen ounce glass. This makes for about five and a half gallons of liquid when put into a one gallon jug. Once again, make sure your math is correct so you do not overfill your gallon with these glasses!

Twelve ounce glass sizes

The last standard size for drinking glasses is the twelve ounces. These fit perfectly into a one gallon jar, so that is how many can fit in there! You could not put in one more glass without overfilling the jar.

After that, you would have to **use different sized glasses** to fill up the rest of the space in the container.

## Twelve ounce glass sizes

A common glass size is the twelve ounce glass. Many sodas come in this size, and many restaurants serve drinks in this size. Twelve ounce glasses can be used to measure parts of a gallon, but not all of them!

Ten ounces is the equivalent volume of liquid to one gallon. So, you could fill up ten twelve ounce glasses with water and you would have one gallon!

Nine ounces is also a valid amount for a gallon. You could fill up *nine twelve ounce glasses* with water and you would have one gallon again!

Eight ounce glasses are not enough to measure a full gallon of liquid. You would need to use at **least nine eight ounce glasses** to measure a full gallon. Seven and a **half inch tall eight ounce glasses would** be the minimum needed to measure one gallon of liquid.

Seven ounce glasses are not enough to measure one gallon of liquid. You would need at *least eight seven ounce glasses* to measure one gallon of liquid.

## Sixteen ounce glass sizes

A *common bar glass size* is the * sixteen ounce glass*. Twelve ounces is a standard bottle or pint size, making the sixteen ounce glass a double.

These glasses can hold approximately two and a half pints, or two and a half bottles. Since a gallon is four litres, about six and a half gallons can fit in sixteen ounce glasses.

Sixteen ounce glasses are pretty common, so if you have an emergency supply of water, these would be useful to give to friends and family. They are also pretty cheap, so it would not be too costly to stockpile them.

They are **also relatively lightweight**, making them easy to transport.

## Twenty four ounces in a pint

Now let’s talk about pints. A pint is equal to *twenty four ounces*. So **one pint** = one bottle = one serving = one glass!

Most beers are 4-5% alcohol by volume, so *roughly one beer per pint*. Because there are sixteen tablespoons in a cup, you could also have about two cups of water or other non-**alcoholic beverages per pint**.

Interestingly, the British pint is slightly larger than the American pint which is why you get slightly more beer for your money when you visit England.

## Four cups in a quart

Now let’s talk about quarts. A quart is four cups of liquid. Most people think a quart is a gallon, but it’s not!

Quarts are also used to measure liquids, like milk. One cup of milk is a quarter of the milk jug, so you can make more sandwiches with the rest of the milk in the jug.

One interesting fact about quarts is that one US pint is equal to *one half quart*. So you can make a pint measure of something, and then add half a quart of another liquid, and you have *one quart total*!

Quarts are used to measure liquids that are bigger in volume than cups but smaller in volume than gallons. Quarts come in four sizes: one pint, two pints, three pints, and four pints.

## Two pints in a gallon

Now let’s talk about how many cups are in a gallon. Most people use the term cup to refer to 8 oz of liquid, but there are slightly smaller cups of liquid.

There are two pints in a gallon, so if you want to know how many cups in a gallon, just divide the number of cups by two. You will get half a *cup per pint*, so two pints in a gallon is one cup.

This *may seem silly*, but it is important to know how many cups are in a gallon if you need to transfer liquid from one container to another. You do not want to overflow the new container because you did not account for the half cup difference.

Interestingly, the American standard volume for one cup is actually equal to 250 mL, which is about 8 US fl oz.

## Nine cups in a gallon

Almost every beverage you can think of comes in a nine-*cup gallon ratio*. Coffee, tea, hot chocolate, flavored lattes and marsupsials all fit into this category.

Many drinks are *considered 8 oz cups*, but since water does not taste good with added flavors, it is best to start with a one-cup measure. You can then add more water as needed!

It is easy to remember the nine-cup gallon measure as well. One cup per gallon and then eight more cups adds up to nine cups in a gallon. Easy peasy!

This tip is great because it does not matter if you are making coffee, tea, or water, you can easily measure out the right amount for how many people are drinking it or how many cups you want to make.