What is a normal Calcium level?

Normal: 8.6 – 10.3 mg/dL. Adult reference range.

What does a high Calcium mean?

A value above the reference band means Calcium is outside the range typical for a healthy adult. A single reading is rarely conclusive on its own — what matters is the trend across draws and the other markers around it, which is why HealthOS reads the whole panel together rather than one number at a time.

Calcium: normal range and what it means

Q: How do I improve my Calcium?

An abnormal result is a reason to check parathyroid hormone, vitamin D and kidney function rather than to change your diet.

Tightly regulated mineral for bones, nerves and muscles.

Normal range

Adult reference range.

Low< 8.6 mg/dL
Normal8.6 – 10.3 mg/dL
High≥ 10.3 mg/dL

7.511.5 mg/dL

What it measures

The calcium circulating in your blood, which your body holds in a very narrow band by pulling from bone when it has to. It says little about how much calcium is in your skeleton.

What moves it

Tightly regulated by parathyroid hormone and vitamin D rather than by how much calcium you eat, so it barely moves with diet. Albumin level affects the reading.

How to bring it into range

An abnormal result is a reason to check parathyroid hormone, vitamin D and kidney function rather than to change your diet.

How fast it responds

Days, because it is tightly regulated.

Also reported as: serum calcium · total calcium

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Common questions

What is a normal Calcium level?: Normal: 8.6 – 10.3 mg/dL. Adult reference range.
What does a high Calcium mean?: A value above the reference band means Calcium is outside the range typical for a healthy adult. A single reading is rarely conclusive on its own — what matters is the trend across draws and the other markers around it, which is why HealthOS reads the whole panel together rather than one number at a time.
How do I improve my Calcium?: An abnormal result is a reason to check parathyroid hormone, vitamin D and kidney function rather than to change your diet.

Related markers

Albumin Magnesium

More in Vitamins & Minerals

25-Hydroxy Vitamin D3 Vitamin B12 Vitamin B9 (Folate)Vitamin B2 (Riboflavin)Magnesium Total Iron Ferritin Iron Profile (Transferrin Sat.)

Reference ranges are general-population guidance compiled from common clinical laboratories, not a diagnosis. Lab-to-lab ranges differ. Always read your results with your doctor.