Confidence votes 262K. Tablespoon means 2 things. It's either a physical tablespoon, which can vary or it's an actual measurement. Officially a tablespoon is 15 grams and a teaspoon is 5 grams.So it means that a tablespoon of a yogurt could be around 18-20 grams.onfidence votes 262K. Tablespoon means 2 things. It's either a physical tablespoon, which can vary or it's an actual measurement. Officially a tablespoon is 15 grams and a teaspoon is 5 grams.