Grams of Sugar to Teaspoons Converter
| Common source ↓ · sugar on the label → | Grams | Teaspoons (4 g) |
|---|---|---|
| Regular cola, 12 oz can | 39 g | 9.8 tsp |
| Sports drink, 20 oz bottle | 34 g | 8.5 tsp |
| Milk chocolate bar, 1.55 oz | 24 g | 6.0 tsp |
| Orange juice, 8 oz glass | 22 g | 5.5 tsp |
| Flavored yogurt, 6 oz cup | 19 g | 4.8 tsp |
| Ketchup, 1 tbsp | 4 g | 1.0 tsp |
Enter either side: grams of sugar on the left, teaspoons on the right, and the converter fills in the other using the spoon size you pick. The default 4-gram teaspoon is the nutrition-label convention - the same math that turns the 39 grams in a 12-ounce can of regular soda into the 10 teaspoons the American Heart Association counts - and the 4.2-gram option is the weighed spoon from USDA data, where a level cup of granulated sugar (200 g) holds about 48 teaspoons.
The two numbers disagree because a teaspoon is a volume and a gram is a weight: labels round the spoon to an even 4 grams, while kitchen scales put a measured teaspoon of granulated sugar at about 4.2. Neither is wrong - pick the label scale when you are reading a nutrition panel, and the weighed scale when you are actually spooning sugar into a recipe.
How to use
- Type the grams of sugar from the nutrition panel into the left box - the teaspoons appear instantly.
- Or type teaspoons into the right box to get grams, which is how most recipes and AHA daily limits are written.
- Switch the rounding scale if you are weighing instead of reading a label: 4 g for label math, 4.2 g for kitchen-spoon weighs.
Frequently asked questions
How many teaspoons is 10 grams of sugar?
On the nutrition-label scale, 10 grams of sugar is 2.5 teaspoons - 10 divided by 4 grams per teaspoon. On the weighed scale it is about 2.4 teaspoons (10 divided by 4.2). Labels and dietitians use the 4-gram spoon, so 2.5 teaspoons is the number to quote.
How many grams are in a teaspoon of sugar?
One teaspoon of granulated sugar is 4 grams by the nutrition-label convention and about 4.2 grams when weighed - a level cup of sugar is 200 grams and holds about 48 teaspoons, and 200 divided by 48 lands on 4.17. The American Heart Association's own arithmetic uses the 4-gram spoon: a 12-ounce can of regular soda has 39 grams, which it counts as 10 teaspoons.
How much sugar is too much per day?
The American Heart Association recommends limiting added sugars to no more than 6% of daily calories - about 6 teaspoons (25 g) a day for most women and 9 teaspoons (36 g) for men. One 12-ounce can of regular soda uses up the entire men's allowance and more of the women's. MedlinePlus counts those added sugars among the simple carbohydrates your body burns through fastest.
Why does the label say 4 grams per teaspoon?
Because the label spoon is a convention, not a measurement: FDA rounding rules let nutrition panels work in even grams, so a teaspoon of sugar is standardized at 4 g (16 calories) on every panel. Actual weighed spoons vary with granularity and how level the spoon is, which is exactly why the weighed option here sits at 4.2 g.
Does the type of sugar change the conversion?
Yes, because density changes with crystal size: granulated white sugar runs about 4.2 g per weighed teaspoon, packed brown sugar about 4.6, and powdered sugar only about 2.5 because half its volume is air. This converter's weighed setting matches granulated sugar - for powdered sugar, treat the result as roughly half the teaspoons you would measure.