How many teaspoons are in 40 milligrams of liqued?

Answer 1

Milligrams are used to measure the mass of something not the volume.

For the sake of argument, let us assume that the liquid that you are talking about has the same density as water. This would mean that the 40 milligrams that you propose would also measure out to 40 milliliters of volume.

1 US teaspoon = 4.92892159 milliliters
If we take 40 ml and divide it by 4.92892159 ml/tsp we come up with 8.1153654546166152340840950565821

or approximately 8.12 teaspoons in 40 milliliters

Now, if the density of the liquid is higher than that of water there will be fewer teaspoons of the high density liquid per 40 milligrams. If lower, the opposite, there would be more teaspoons per 40 milligrams.