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What percentage of the human body is calcium?

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A labeled diagram of the periodic table entry for calcium, showing its atomic number 20, symbol Ca, atomic weight 40.078, electron configuration, and classification as an alkaline-earth metal. Icons indicate calcium is a solid with a face-centered cubic crystal structure and strongly basic oxides at room temperature. — calcium The chemical element calcium is the most abundant metallic element in the human body.

The human body is approximately 2 percent calcium.1

While this percentage represents the total amount of calcium in the body, it is important to note that about 99 percent of this calcium is stored within the bones and teeth, where it serves as a primary structural element. The remaining 1 percent circulates in the bloodstream and other tissues, where it is vital for essential physiological processes such as muscle contraction, nerve impulse transmission, and blood clotting.123