Question

How to convert Liter to milliliters?

Answer 1

Here we know that we have to convert Liter into milliliter which is from higher unit to lower unit. Major Key for working a liter to milliliter problem vice versa is known as the conversion factor.
-There are $1000$ milliliters in each liter because this is a factor of $10$ , you don't actually have to use a calculator with some basic calculations and conversion.
-By moving it $3$ spaces to the right to convert liters to milliliters (e.g. $5.442\text{ }L=\text{ }5443\text{ }ml$ ) or three spaces to the left to convert milliliters to liters (e.g. $45\text{ }ml\text{ }=\text{ }0.045\text{ }L$ ).
-The basic formula for conversion of $mL$ to $L$ or $L$ to $mL$ is given by
$1mL\text{ }=\text{ }\dfrac{1}{0.001}\text{ }L$or $L\text{ }=\text{ }1000\text{ }mL$

Complete answer:
To understand more precisely we can take example of how many milliliters are in a $3$ liter:
$1$ Liter $=\text{ }1000\text{ }mL$
Set up the conversion so the desired unit will be cancelled out. In this case, we want $mL$ to be the remaining unit.
Volume in $mL=\text{ }\left( Volume\text{ }in\text{ }L \right)\times \dfrac{1000mL}{1L}$
Volume in $mL=\text{ }3\text{ }L\text{ }\times \dfrac{1000mL}{1L}$
Volume in $mL=\text{ }3000\text{ }mL$

Therefore, conversion of $3L$ into $mL$ is $3000mL$.

Note: Now that we have got the conversion of $L$ to $mL$ with an example of $3L$ to $3000mL$. We can cross verify the conversion.
-There are $1000$ times more milliliters than liters, so the milliliter number should be much greater than the liter number.
-Also, since we are multiplying by a factor of $10$ , the value of the digits won't change. It's only a matter of moving the decimal point.