Home › Categories › Clinical Biochemistry › Total Calcium

Total Calcium

Serum Calcium Ca2+
Serum (SST) mmol/L

About this test

Serum calcium includes protein-bound (mainly albumin), complexed, and free ionised fractions. Must always be adjusted for albumin concentration.

Reference Ranges

Sex Age Range Notes
All ≥ 18 yrs 2.15 – 2.55 Adult total calcium

Clinical Interpretation

Low / Decreased
Hypocalcaemia — hypoparathyroidism, vitamin D deficiency, chronic renal failure, hypomagnesaemia, pancreatitis.
High / Increased
Hypercalcaemia — primary hyperparathyroidism, malignancy, vitamin D toxicity, sarcoidosis, thiazide diuretics, milk-alkali syndrome.

Related Tests

Albumin Adjusted Calcium Phosphate
Specimen
Serum (SST)
Reporting Unit
mmol/L
Category
🧪 Clinical Biochemistry

⚠ Clinical Note
Reference ranges are indicative. Always interpret results in the context of the individual patient and local laboratory reference intervals, which may vary.