Calcium/PTH Calculator

Calcium disorder workup from calcium, PTH, and vitamin D.

Medical Disclaimer

This calculator is for informational and educational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider before making decisions about your health. Never disregard professional medical advice or delay seeking it because of results from this tool.

Inputs

Total Calcium (mg/dL)

Albumin (g/dL)

PTH (pg/mL)

25-OH Vitamin D (ng/mL)

Tab to move between fields

Results

Corrected Calcium (mg/dL)

9.5

Est. Ionized Ca (mg/dL)4.75

Calcium Status (0–2)1

PTH Status (0–2)1

Vitamin D Status (0–3)2

Diagnosis Pattern (0–4)0

How to Use This Calculator

Enter Total Calcium (mg/dL) and Albumin (g/dL) from the lab report.
Input PTH (pg/mL) and 25-OH Vitamin D (ng/mL).
Review Corrected Calcium (mg/dL) — adjusted for hypoalbuminemia.
Check Calcium Status, PTH Status, and Vitamin D Status for each axis.
Use the Diagnosis Pattern to guide workup: primary hyperparathyroidism, vitamin D deficiency, hypoparathyroidism, etc.

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