The calorie count may vary according to teaspoon because the texture of raw sugar is sometimes heavier, and teaspoon is a measure of volume, not weight. since there are 3 teaspoons in 1 tablespoon, that means 1 tablespoon of sugar is equivalent to 12 grams of sugar and a total of about 50 calories.. There are 8 calories in a 1/2 teaspoon of Sugar. Men: no more than 150 calories per day which equals 9 teaspoons or 36 grams To put these numbers in perspective, the majority of sugar sweetened cereals contain at least 4 teaspoons of sugar per serving. Women: no more than 100 calories per day which equals 6 teaspoons or 24 grams. One teaspoon of sugar has 16 calories that come from about 4 grams of simple carbohydrates. The total fat content of (1 Tsp Serving) 1 tsp sugar is 0 g. Within the fat content, a 1 tsp sugar contains 0 g of saturated fat, 0 g of trans fat, 0 g of polyunsaturated fat and 0 g of monounsaturated fat. There is no fiber or starch in granulated sugar. here’s the math: 4 grams of sugar/teaspoon x 4 calories/gram = 16 calories per teaspoon of sugar. In a 1 tsp sugar ( (1 Tsp Serving) ) there are about 16 calories out of which 0 calories come from fat. Calories, fat, protein, and carbohydrate values for for 1 Tbsp Brown Sugar and other related foods. However, the glycemic load of one teaspoon of sugar is only 3. Many health professionals believe that there is a direct relationship between high-sugar diets and obesity, since excess sugar consumption causes an increase in body metabolism, which can affect the calories in a teaspoon of sugar. Get full nutrition facts and other common serving sizes of Sugar including 1 Guideline amount per fl oz of beverage and 1 tsp. The glycemic index of granulated sugar is 65, making it a high glycemic food. One teaspoon of sugar is equivalent to 4 grams and about 16 calories.