how do I conver 2.857 mg to ml assuming it is water?

Answer 1

1 gram of water is 1 ml
so 2.857 mg * 1ml/ 1 gram = 2.857 x 10^-3 ml or 2.857 micro liter

Answer 2

IF the liquid is water, its density is 1 gram per cc which is same as a milli liter. So, 2.875 mg of water will be 2.875 micro liter, or 0.002875 ml. (You need o divide 2.875 by 1000 since a mg, milligram is a thousandth part of a gram).

Answer 3

1g=1ml
2.857mg=(2.857/1000)g=.002857g
if 1g=1ml then .002857g=.002857ml