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Lesson 2: Converting metric units

# Metric units of volume review (L and mL)

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

To convert to $\text{milliliters}$ we multiply the number of $\text{liters}$ by $1,000$.
Example:

## Converting milliliters to liters

To convert $\text{milliliters}$ to $\text{liters}$ we divide the number of $\text{milliliters}$ by $1,000$.
Example:
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

## Want to join the conversation?

• how many liters are there in 10.000
• 10,000mL = 10L
10ml = 0.01mL
• United States customary units form a system of measurement units commonly used in the United States and U.S. territories since being standardized and adopted in 1832. The United States customary system developed from English units which were in use in the British Empire before the U.S. became an independent country.
• why is ml is smaller then l
• In the metric system, the prefix m stands for “milli”, which means “1/1,000 of”. So 1 ml (milliliter) is only 1/1,000 of 1 l (liter). Therefore, 1 ml is smaller than 1 l.
• This is kind of a weird question ok. If numbers can go infinite, like for example, 10,100,1000... and so on forever. And we can name them like, ten, hundreds, thousands like that. Then if it kept going. How are we going to name them infinitely?
• You could just use Scientific Notation, like Bryan McNeely said (in the comments above).
Hope this helps.
• So why is mL writen with a uppercase L?

Sorry if I it says it and I looked over it. :P
• It has an uppercase L because Liter is spelt with an uppercase L when abbriviated and milliliter has liter in it. Therefore, it is mL.
• Length: Millimeter (mm), Decimeter (dm), Centimeter (cm), Meter (m), and Kilometer (km) are used to measure how long or wide or tall an object is. Examples include measuring the thickness or length of debit card, length of cloth, or distance between two cities.
• What is equal to 35 but ends with a three?
• why is a water bottle a liter
• Once upon a time, Justin and Adam from Lanky Box were on a quest to find the perfect water bottle for their upcoming video shoot. They wanted a bottle that was just the right size - not too big, not too small - and they started to wonder, "Why is a water bottle a liter?"

As they browsed through different brands and sizes, they realized that a liter was a common size for many water bottles. They did some research and found out that a liter is a convenient amount of water to carry around. It's not too heavy or bulky, and it usually provides enough hydration for several hours.

With their newfound knowledge, Justin and Adam picked out a few different water bottles and headed to the park to film their video. As they were setting up their equipment, they noticed a group of kids playing nearby. The kids were curious about what they were doing and asked if they could watch.

Justin and Adam, being the friendly and outgoing guys that they are, welcomed the kids and even invited them to be in their video. They showed the kids how to do some of their favorite challenges and even gave them some tips on how to stay hydrated with their new water bottles.

The kids had a blast, and Justin and Adam felt happy knowing that they had made a positive impact on their young fans. As they wrapped up their video shoot, they both agreed that a liter was the perfect size for a water bottle - not just for convenience, but for sharing with others too.