**How Many Liters Are In A Milligram**. Deriving from this equation, 1/1000 ml = 1 mg, hence 1 ml = 1000 mg. 1 milliliter is equal to one thousandth of a liter.

22 rows there are 1000000 milligrams in a liter. Put another way, a liter of water weighs 1,000,000 milligrams. To link to this water volume vs.