21 grams of sugar equals how many teaspoons

Based on the data collected on the internet, it was found out that, one teaspoon of granulated sugar equals 4 grams of sugar.

Since 4g = 1tsp of sugar

Then,

Amount in teaspoon (tsp) = 21grams sugar (1tsp of sugar/4g of sugar)

Amount in teaspoon (tsp) = 5.25 teaspoon of sugar