Corrected Calcium Calculator
Calculate albumin-corrected calcium level for patients with low albumin.
How to Use the Corrected Calcium Calculator
- Enter the required values into the input fields.
- Click the Calculate button to see the results.
- Review the output values and interpretations below.
Quick Reference
| From | To |
|---|---|
| Hypocalcemia | < 8.5 mg/dL |
| Normal | 8.5–10.5 mg/dL |
| Hypercalcemia | > 10.5 mg/dL |
| Normal albumin | 3.5–5.0 g/dL |
Use Cases
- •Monitoring personal health metrics and tracking changes over time.
- •Supporting clinical decision-making with quick formula-based estimates.
- •Educational use for students learning health and fitness calculations.
Formula
Formula: Corrected Ca = Measured Ca + 0.8 × (4.0 − Albumin). Normal range: 8.5–10.5 mg/dL.
Frequently Asked Questions
Why correct calcium for albumin?
About 40% of blood calcium is bound to albumin. When albumin is low, total calcium appears falsely low. The correction estimates true calcium levels.
What is the normal albumin used?
The formula uses 4.0 g/dL as the reference albumin level. For each 1 g/dL decrease in albumin, measured calcium is adjusted up by 0.8 mg/dL.
What is a normal calcium level?
Normal total serum calcium is 8.5-10.5 mg/dL (2.12-2.62 mmol/L). Corrected calcium accounts for albumin binding.