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What are grams?

Grams (g) are a unit of measurement. Often used in nutritional values for nutrients such as carbohydrate, protein and fiber.

How many grams are in an ounce?

One ounce is approximately 28.3495 grams. In order to convert ounces to grams, multiply the number of ounces by 28.35. 

How many grams are in carbohydrates?

A standard serving of carbohydrates is approximately 15 grams. Examples of one carbohydrate serving includes a small piece of fruit, one slice of bread, or ⅓ cup of pasta. Carbohydrates contain 4 calories per gram, so one serving of carbohydrate contains approximately 60 calories.

How many grams are in fat?

A standard serving of fat is approximately 5 grams. Examples of one fat serving includes 1 teaspoon of oil, or 1 tablespoon of salad dressing or low-fat mayonnaise. There are 9 calories in one gram of fat, so one serving of fat contains approximately 45 calories.

How many grams are in protein?

A standard serving of lean protein meat is approximately 3 ounces, and one ounce contains approximately 7 grams. This is about the size of a deck of cards. There are 4 calories in one gram of protein, so one serving of lean protein meat contains approximately 84 calories.

Related Terms

Milligrams Micrograms

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Photo of Kristin Ricklefs-Johnson

Medically reviewed by:

Kristin Ricklefs-Johnson, Ph.D., RD

Kristin is an RDN who also earned her Ph.D. in Nutrition from Arizona State University with an emphasis on insulin resistance, lipid metabolism disorders, and obesity. She completed her post-doctoral fellowship at Mayo Clinic where she focused on nutrition-related proteomic and metabolic research. Her interests include understanding the exact mechanism of action of various genetic variations underlying individual predispositions to nutrition-related health outcomes. Her goal is to help all individuals prevent chronic diseases and achieve long, healthy lives through eating well.

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