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What are milligrams?

Milligrams (mg) are a unit of measurement. One milligram is equivalent to one thousandth of a gram. Often used for measuring nutritional values of nutrients we need small amounts of, like calcium and iron. 

How to convert milligrams to micrograms?

Both milligrams and micrograms may be used to make precise measurements. Sometimes you may need to convert between the two. There are 1,000 micrograms (mcg) for every 1 milligram (mg). This means 1 mcg is equal to 1/1,000 mg or 0.001 mg. 

1 milligram = 1,000 micrograms

How many milligrams are in one gram?

When converting milligrams to grams, you need to know how many milligrams are in 1 gram. There are 1,000 mg in 1 gram. This means 1 mg is equal to 1/1,000 grams or 0.001. 

1 gram = 1,000 milligrams

How many milligrams are in one teaspoon?

Although both are common measurements, a milligram is a measurement for mass, whereas a teaspoon measures volume. Depending on the item you are measuring, one teaspoon may have a different mass. For example, one teaspoon of salt is equal to approximately 6,000 milligrams, and one teaspoon of water is equal to approximately 5,000 milligrams.

Related Terms

Micrograms Grams

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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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