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Calculate albumin-corrected serum calcium levels for accurate clinical assessment. Our medical calculator helps healthcare professionals diagnose hypocalcemia and hypercalcemia by adjusting for albumin concentration.
Last updated: February 2, 2026
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Normal range: 8.5-10.5 mg/dL
Normal range: 3.5-5.0 g/dL
Corrected Calcium:
9.9 mg/dL
Interpretation:
Normal
Normal Range:
8.5 - 10.5 mg/dL
Clinical Analysis:
Corrected calcium is within the normal range, indicating proper calcium homeostasis.
Medical Disclaimer:
For Total Calcium: 9.5 mg/dL, Albumin: 3.5 g/dL:
Corrected Calcium: 9.9 mg/dL
Normal - 8.5 - 10.5 mg/dL
Our corrected calcium calculator uses established medical formulas to adjust serum calcium levels based on albumin concentration. This adjustment is crucial because approximately 40-45% of calcium is protein-bound, primarily to albumin, making accurate assessment dependent on albumin levels.
Corrected Ca = Total Ca + 0.8 × (4.0 - Albumin)Corrected Ca = Total Ca + 0.02 × (40 - Albumin)These formulas assume normal albumin levels of 4.0 g/dL (40 g/L) and adjust calcium based on the difference from this reference value. The correction factor accounts for the protein-binding relationship between calcium and albumin.
Shows how albumin levels affect calcium binding and measurement
Calcium plays essential roles in bone health, muscle contraction, nerve function, and blood clotting. However, only ionized (free) calcium is physiologically active. Since total calcium measurements include both bound and free calcium, albumin correction provides a better estimate of the biologically active calcium fraction when ionized calcium testing isn't available.
This calculator is provided for educational and informational purposes only. It should not be used as a substitute for professional medical advice, diagnosis, or treatment. Always consult with qualified healthcare professionals for medical decisions.
Need help with other medical calculations? Check out our creatinine clearance calculator and anion gap calculator.
Get Custom Medical Calculator for Your PlatformClinical Insight: Despite low total calcium, corrected calcium is normal
The low total calcium was due to hypoalbuminemia, not true hypocalcemia. This patient would not require calcium supplementation.
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