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# Metric system: units of volume

CCSS.Math:

## Video transcript

let's think a little bit about the metric the metric system units for volume or essentially how much space something is taking up in three dimensions so the base unit in the metric system for volume is the leader is the leader and there's a couple of ways that you can visualize a leader one way you could think about a leader is if you took a cube if you took a cube that is 10 centimeters 10 centimeters deep 10 centimeters wide and 10 centimeters tall then this amount of space that you're taking up this volume this volume is one liter so this right over here is one liter another way to connect it to our everyday lives is you've probably gone and bought or your parents have bought a two-liter bottle of something oftentimes it's soda so this right or those two liter bottles are as I just mentioned these are 2 litres so let me my best attempt to draw what those bottles look like they look something like they look something like this at least in the US you oftentimes so2 and other things will be sold in these in these two liter in these two liter bottles so if you take half of this you are looking at a liter more so this so liter would be about half of this so if it's half full a liter would be about that much and hopefully that is consistent or that makes sense relative to this 10 centimeter by 10 centimeter by 10 centimeter 10 centimeter cube now if you want to measure things that are a lot smaller than a liter the typical unit used and obviously in the metric system you can always use the prefixes deci centi but the one that's most typically used is the milliliter milli the mili liter and we've already seen the prefix milli it means one thousandth so this means one thousandth one thousandth of a one thousandth of a liter or another way of thinking about it is one liter is equal to one thousand 1,000 milliliters mili mili liters and if you wanted to visualize what a milliliter looks like imagine taking a cube instead of making it 10 centimeters on each dimension make it only one centimeter in each dimension so one centimeter wide one centimeter one centimeter deep one centimeter wide and one centimeter high and then you're looking at a milliliter and if you want to think about the type of things that are measured in milliliters you might think things about dosage of medicine so for example a typical a teaspoon that you might see in your cabinet is going to be a little bit over four milliliters almost five milliliters so that might be good for medicine dosage or maybe small ingredients in some type of a recipe if you want to go larger than a liter and once again you could use all the metric prefixes you could use dekaliter you could use hectolitre but the one that's most typically used is kiloliter kill a liter kill Oh a liter and as the prefix kilo implies this is equivalent to 1,000 1,000 liters and if you want to visualize this you can this actually isn't as large as you might assume it to be if you just take a cube and this side and instead of taking each dimension being 10 centimeters if you were take a cube where each dimension is exactly 1 meter each dimension is exactly one meter so one meter deep one meter wide and one meter tall this volume is equivalent to one kiloliter one kilo liter so you can imagine something like a kiloliter would be very useful for measuring say the volume of water inside of a of a swimming pool