# Metric units of volume review (L and mL)

CCSS Math: 5.MD.A.1
Review the size of liters and milliliters and how to convert between the two.  Then, try some practice problems.

## Metric units of 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 metric system of measurement, the most common units of volume are milliliters and liters.

### How big is a milliliter?

A single raindrop contains about $1$ milliliter of liquid:

### How big is a liter?

This bottle contains about $1$ liter of liquid:
Problem 1A
Identify the most reasonable unit to measure the volume of a neighborhood swimming pool.
Want to try more problems like this? Check out this exercise,

## Converting liters to milliliters

$\blueD{1} \text{ liter} = \greenD{1000}\text{ milliliters}$
To convert $\text{ liters}$ to $\text{milliliters}$ we multiply the number of $\text{liters}$ by $\greenD{1,000}$.
Example:
$\blueD{8} \text{ liters} = \blueD{8}\times \greenD{1000}=\blueD{8}\greenD{000}\text{ milliliters}$

## Converting milliliters to liters

$\pink{1} \text{ milliliter} = \dfrac1{\green{1000}}\text{ liter}$
To convert $\text{milliliters}$ to $\text{liters}$ we divide the number of $\text{milliliters}$ by $\greenD{1,000}$.
Example:
$\pink{45} \text{ mL}= \dfrac{\pink{45}}{\green{1000}} = \pink{45}\div\green{1000}=\blue{0.045}\text{ L}$
Problem 2A
Convert.
$49$ liters $=$
milliliters
Want to try more problems like this? Check out these exercises:
Convert larger units to smaller units
Converting between units