Liters to milliliters examples

What we're going to do in this video is some examples converting between liters and milliliters. Just as a reminder, "mili" means 1/1000th, so a milliliter is 1/1000th of a liter. Another way to think about it: one liter is one thousand milliliters.

So, given that, how many milliliters would seven liters be? Pause the video and think about that.

Well, if one liter is one thousand milliliters, then seven liters would be seven thousand milliliters. And what about eighteen liters? Pause the video and think about it.

Well, that would be eighteen thousand milliliters. So, however many liters you've got, it would be a thousand times as many milliliters, because each milliliter is one thousandth of a liter.

Let's do some more examples. So here it says blank milliliters equals 15 liters. Pause the video again; see if you can figure this out.

Well, remember every liter is a thousand milliliters, so 15 liters would be 15,000 milliliters. Remember, if you have a smaller unit, and here you're smaller by a factor of a thousand, the number that you would need of it to have the same as a large unit would be larger. So, you have a smaller unit, so you have a larger number here.

Let's do one more example. Compare using greater than, less than, or equal to. So, 9 liters: how does that compare to 90 milliliters? Pause this video and try to answer it for yourself.

Well, how many milliliters is 9 liters? 9 liters is the same thing as 9,000 milliliters, and 9,000 milliliters is clearly greater than 90 milliliters.

So what you want to do in a problem like this is convert both to milliliters. 9,000 milliliters—that's what 9 liters is. That's 9,000 milliliters, and that's going to be greater than 90 milliliters.