Corrected Calcium Calculator
Calculate corrected calcium level based on albumin
About this calculator
The Corrected Calcium Calculator adjusts total serum calcium levels based on albumin concentration to provide a more accurate assessment of calcium status. Since approximately 40% of calcium is bound to albumin, low albumin levels can make total calcium appear falsely low. This calculator helps healthcare providers determine true calcium levels by applying a correction formula, ensuring proper diagnosis and treatment of calcium disorders, particularly in patients with hypoalbuminemia or other conditions affecting protein levels.
How to use
Enter the patient's total serum calcium level in mg/dL and their albumin level in g/dL into the respective fields. The calculator will automatically apply the correction formula (typically adding 0.8 mg/dL for every 1 g/dL that albumin is below 4.0 g/dL) to display the corrected calcium value.
Frequently asked questions
When should I use corrected calcium instead of total calcium?
Use corrected calcium when albumin levels are abnormal (below 4.0 g/dL or above normal range) to get accurate calcium status assessment.
What is the normal range for corrected calcium?
Normal corrected calcium typically ranges from 8.5-10.5 mg/dL, though reference ranges may vary slightly between laboratories and patient populations.
Is corrected calcium always more accurate than ionized calcium?
No, ionized calcium measurement is the gold standard when available, as it directly measures physiologically active calcium without requiring calculations.