How many teaspoons are in 21 grams of sugar?

There are approximately 3.5 teaspoons in 21 grams of sugar. To calculate this, you can use the conversion factor that 1 teaspoon of sugar is equivalent to 4 grams. So, 21 grams of sugar is equal to 21 grams / 4 grams/teaspoon = 5.25 teaspoons. Rounded to the nearest tenth of a teaspoon, this is 3.5 teaspoons.