convert 500mg to what percentage of a teaspoon?

Answer 1

Sorry, no can do with the data given. You're trying to convert a mass quantity to a volume measurement. Without the identity or density of the substance there is inadequate data to resolve the problem.

If we assume the substance to be water, it becomes much easier. Given the volume of a standard teaspoon to be 5cc, this translates to 5 gm of water, which equals 5,000 mg of water. 500 mg is equal to 1/10 of a teaspoon.

This makes the final answer -- 10% of a teaspoon (again assuming that the substance in question is water).

Answer 2

The first answerer is quite right, but I would like to add my 2 cents.

If we are talking about a drug dose, those milligrams of drug have been mixed in with the stuff that forms a tablet, if its a pill, or in a liquid, if its a syrup. A mg is a thousandth of a gram, and a gram can be visualized as being about the size of a raisin. So you are looking at 1/2 a raisinweight of active ingredient in 500 mg.

If you are measuring water, 1 gram = 1 milliliter, so 500 mg of water = 1/2 a mL (1/10 of a teaspoon) would do it. BUT THAT CALCULATION ONLY WORKS FOR WATER. It would not be anywhere near accurate for any other compound, and it would be a bad idea to try.

Since you are asking about teaspoons you have to find out how many mg are in a milliliter or in a teaspoon (which is 5 milliliters) - it should say on the bottle. If its not labelled with concentration, I would avoid taking it, as the only drugs that don't have that sort of labelling are illegal ones.