You may have to convert a volume expressed in milliliters to liters to complete a math problem on a test. Knowing how to convert milliliters to liters might also be necessary when performing a science experiment. Many conversions require you to multiply by a conversion factor, but this task can be accomplished by simply moving the decimal point. By definition, there are 1,000 milliliters in a liter.
Write down the number of milliliters you want to convert. For example, suppose you want to convert 410 milliliters to liters.
Make sure that you place the decimal point of your number correctly. In the example, the decimal point would come after the "0." So you would write "410."
Move the decimal point three places to the left. You should obtain the number "0.41" as your answer. So 410 milliliters equals 0.41 liter.