Ripped, you can't convert between different parameters.
teaspoons are a unit of volume and grams are a unit of mass.
These two parameters are only related by density, which is the mass of a substance divided by it's volume.
here's the density of some supps I have on hand, notice that they're significantly different:
BCAA's : 1.2 grams per teaspoon
CEE: 5 grams per teaspoon
Muirama Puama 10:1 : 3.2 grams per teaspoon