Since the liter measures exactly the same as a decimeter cubed, it also equals a thousand centimeter cubes.

        1 L = 1000 cm³

    So breaking up the liter into a thousand equal pieces produces milliliters.

        1000 mL = 1000 cm³

    So, 1 mL = 1 cm³

    You may be wondering how the grams got involved in all this. Well, ...

    A liter of water, at 4° Celsius, weighs one kilogram.

    So, 1 cm³ of water weighs 1 gram.

    So, 1 liter of water weighs 1 kilogram and fills 1 dm³.

    and that's a triangle if ever I've seen one.

© MC, i. 00-8-3, www.mathnstuff.com /math/spoken/here/2class/110/milli2c.htm