Those two units of measure do not convert. One is weight or mass and the other is volume.
450 liters is 15,216.3 fluid ounces.
There are about 15.216 US fluid ounces in 450 mL.
450 milliliters is 15.22 fluid ounces.
There are approximately 0.0159 ounces in 450 milligrams.
15.221 fluid ounces
A milligram is 28,000 times smaller than an ounce
1 ounce is 28.35 gm. -So 450 ml is 15.8 ounces.
450 milligrams = 0.450 gram
450 milligrams = 0.45 grams.
There are 1000 milligrams in one gram. Therefore, 450 milligrams is equal to 450/1000 = 0.45 grams.
450 mL = 15.2 US fluid ounces.
450 milliliters is 15.22 fluid ounces.