Im suppose to take 200 mg. the syringe says 1ml, 2ml and 3ml. what is the conversion?

Question

Im suppose to take 200 mg. the syringe says 1ml, 2ml and 3ml. what is the conversion?

Answer 1

There is no conversion.

1 ml of water weighs close to 1 gram.  That is a thousand milligrams of water. That is only for pure water, but very dilute solutions are close to the same density.

If you are asking about some solution of a drug or active substance in water, then if the active has a concentration of 1 mg per ml or 1 gram per litre, then 1 ml of solution has 1 mg.  If the active is 5 mg per ml or 5 grams per litre, then 1ml has 5 mg.  

You need to know the concentration of the solution.        

Answer 2

1mg = 1/1,000 of a gram. (0.001g) and, 1g of water = 1mL.

If the density of the liquid is equal to that of water, then 200mg...

= 200mg / 1,000mg/g = 0.2mg = 0.2mL.

Answer 3

Depends what the liquid is but basically

volume = mass/ density so if you want the mass which is mg

then m= volume times density and make sure the units cancel out

density is usually in grams/ ml so you would get the mass in grams and you'd have to convert to mg by multiplying by 1000