Free Corrected Calcium Calculator
Calculate albumin-corrected serum calcium to account for low protein levels.
mg/dL
g/dL
Corrected Calcium
9.3 mg/dL
Adjustment Amount0.8 mg/dL
Corrected Calcium vs Total Serum Calcium
Corrected Calcium Formula
Corrected Ca = Total Ca + 0.8 x (4.0 - Albumin)
About 40% of serum calcium is bound to albumin. When albumin is low, total calcium appears low even if ionized (active) calcium is normal.
Normal Ranges
Example Calculation
Total calcium 8.5 mg/dL with albumin 3.0 g/dL.
- 01Adjustment = 0.8 x (4.0 - 3.0) = 0.8 mg/dL
- 02Corrected Ca = 8.5 + 0.8 = 9.3 mg/dL
- 03Within normal range (8.5-10.5)
Frequently Asked Questions
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