Q. How many grams are in a teaspoon?
This is a more difficult question than you might think. Why? Because a teaspoon is technically not a unit of weight like a gram is. It is more of an amount, or, more precisely, a volume.
But you don’t care about that. So, the rough answer is: 1 teaspoon equals 4 grams.
Most of the time when people want to understand how many grams in a teaspoon, they are trying to convert the nutrition numbers of a food into a measurement they understand. So, if a can of Coke has 39 grams (and it does, I just checked), it has between 9 and 10 teaspooons of sugar in that one 12-ounce can.