It depends on what you are measuring.
ml is a measurement of volume whereas mg is a measurement of weight.
This cannot be sensibly answered. Milliliters (mL or ml) and liters (L) are measures of volume. Grams (g), kilograms (kg) and milligrams (mg) are measures of weight or mass.
This is not a valid conversion; milligrams (mg) and grams (g) are measures of weight or mass and mL (milliliters) is a measure of volume.
200 milligrams = 0.2 grams.
15
1 ml
It looks like the 3.5 ml may be extraneous information. If 1 ml yields 250 mg, then you need 400/250 = 1.6 ml, to get 400 mg.
.5 ml
This is not a valid conversion; milligrams (mg) and grams (g) are measures of weight or mass while milliliters (mL or ml) measure volume.
1 gram = 400 milligram , thun , 1 milligram = 1/1000 gram 400 mg = 400/1000 gram = 4/10 gram = 0.4 gram
400 mg = 0.4 g
Accordingly, 1 ml = 1/7.5 mg = 0.133 mg
84 mg/ml, or 1680 mg/20 ml
15 ml
You should calculate this way : 75 mg = 1 ml 45 mg = ? ml ( 45 mg x 1ml ) / 75 mg = 0,6 ml
it depends on the concentration of the medication... in mg/ml... you can convert mg/ml to mg/cc as 1 ml = 1 cc. If your medication is at a concentration of 10 mg/ml, then you have 10 mg in 1 cc. You can calculate 1 mg in 0,1 cc.
.005 mg
2.5 ml