What is the reference range for Calcium, Total?

The standard reference range for Calcium, Total is Approximately 2.12–2.62 mmol/L (8.5–10.5 mg/dL), age- and laboratory-specific.. Reference ranges vary by laboratory and assay platform — interpret in context of the issuing laboratory's stated range.

Which tests measure Calcium, Total?

Calcium, Total is measured in 1 test on BiomarkersLabs.com, including Comprehensive Metabolic Panel with Adjusted Calcium, Plasma.

Biomarker Reference · Ca

What does the Calcium, Total test measure?

Calcium, Total (Ca) is a clinical biomarker used in metabolic-diabetes assessment. Approximately 40% of circulating calcium is bound to albumin, 10% to other anions, and 50% circulates as the physiologically active ionised fraction. It is measured in 1 laboratory test on BiomarkersLabs.com.

Reference Range: Approximately 2.12–2.62 mmol/L (8.5–10.5 mg/dL), age- and laboratory-specific.
Units: mmol/L, mg/dL
Measured In: 1 test
Category: Metabolic

Functional medicine optimalWithin laboratory reference limits; adjusted calcium or direct ionised calcium measurement is preferred when albumin is low or acid–base status is abnormal.

What is Calcium, Total?

Approximately 40% of circulating calcium is bound to albumin, 10% to other anions, and 50% circulates as the physiologically active ionised fraction. Parathyroid hormone, vitamin D, and calcitonin regulate calcium homeostasis through intestinal absorption, renal reabsorption, and skeletal mobilisation.

Why is Calcium, Total measured?

Total calcium is the routine screening marker for disorders of calcium homeostasis. Hypercalcaemia is most often caused by primary hyperparathyroidism or malignancy; hypocalcaemia arises with hypoparathyroidism, vitamin D deficiency, chronic kidney disease, and hypomagnesaemia. Because albumin concentration affects total calcium, adjustment formulas estimate ionised calcium when albumin is abnormal.

Reference ranges

Standard reference: Approximately 2.12–2.62 mmol/L (8.5–10.5 mg/dL), age- and laboratory-specific.
Functional medicine optimal: Within laboratory reference limits; adjusted calcium or direct ionised calcium measurement is preferred when albumin is low or acid–base status is abnormal.
Units: mmol/L, mg/dL

Reference ranges vary by laboratory and assay platform. Interpret in context of the issuing laboratory's stated range.

Tests that measure Calcium, Total

1 test on BiomarkersLabs.com include this biomarker.

BML-MET-026Comprehensive

Comprehensive Metabolic Panel with Adjusted Calcium, Plasma

Calcium, Total reference range in this test: Approximately 2.12–2.62 mmol/L (8.5–10.5 mg/dL), age- and laboratory-specific.

Related clinical conditions

Related Biomarkers

Frequently measured alongside

Glucose, PlasmaGluc1 test Blood Urea NitrogenBUN2 tests Creatinine, PlasmaCreat1 test Estimated Glomerular Filtration RateeGFR6 tests SodiumNa6 tests PotassiumK6 tests ChlorideCl6 tests Carbon Dioxide, Total (Bicarbonate)CO₂1 test

Order tests measuring Calcium, Total for your patients

Available exclusively to verified licensed healthcare practitioners. CLIA-certified laboratory results delivered to your secure portal.