## Summary of customary units of volume

Cups | Pints | Quarts | Gallons |
---|---|---|---|

$16$ | $8$ | $4$ | $\goldD1$ |

$4$ | $2$ | $\goldD1$ | $\dfrac14$ |

$2$ | $\goldD1$ | $\dfrac12$ | $\dfrac18$ |

$\goldD1$ | $\dfrac12$ | $\dfrac14$ | $\dfrac{1}{16}$ |

### What is volume?

Volume measures capacity. For example, the volume of a bowl is the amount of space inside the bowl or how much water, for example it would take to fill the bowl.

In the US customary system of measurement, the most common units of volume are cups, pints, quarts and gallons.

### How big are customary units of volume?

A juice box contains about $1$

**cup**of liquid.A

**pint**is equal to $2$ cups. A water bottle contains about $1$**pint**of liquid.A

**quart**is equal to $2$ pints. A large shampoo bottle contains about $1$**quart**of liquid.A

**gallon**is equal to $4$ quarts. A milk jug contains about $1$**gallon**of liquid.*Want to learn more about customary units of volume? Check out this video.*

## Converting larger units to smaller units

$1 \text{ pint} = \greenD{2}\text{ cups}$

$1 \text{ quart} = \greenD{4}\text{ cups}$

$1 \text{ quart} = \greenD{2}\text{ pints}$

$1 \text{ gallon} = \greenD{4}\text{ quarts}$

$1 \text{ quart} = \greenD{4}\text{ cups}$

$1 \text{ quart} = \greenD{2}\text{ pints}$

$1 \text{ gallon} = \greenD{4}\text{ quarts}$

To convert larger units to smaller units we multiply the number of larger units by the green conversion factor for the appropriate smaller units.

**Example: Converting gallons to quarts**

$1 \text{ gallon} = \greenD{4}\text{ quarts}$

$\blueD{2} \text{ gallons} = \blueD{2}\times \greenD{4}=8\text{ quarts}$

$\blueD{2} \text{ gallons} = \blueD{2}\times \greenD{4}=8\text{ quarts}$

**Example: Converting pints to cups**

$1 \text{ pint} = \greenD{2}\text{ cups}$

$\blueD{8} \text{ pints} = \blueD{8}\times \greenD{2}=16\text{ cups}$

$\blueD{8} \text{ pints} = \blueD{8}\times \greenD{2}=16\text{ cups}$

## Converting smaller units to larger units

To convert smaller units to larger units we divide the number of smaller units by the purple conversion factor for the appropriate larger units.

**Example: Converting pints to quarts**

*Want to learn more about converting between units of volume? Check out this video.*

## Practice set 2: Converting units of volume

*Want to try more problems like this? Check out these exercises:*

Convert larger units to smaller units

Converting between units