Corrected Calcium Calculator
Estimate corrected calcium from measured calcium and albumin.
Corrected Calcium measurements
Enter your values, then calculate.
Result
How to calculate corrected calcium
This calculator adjusts a measured calcium level for low albumin, since a large share of blood calcium is bound to albumin and low albumin can make total calcium appear falsely low.
How the calculation works
Corrected calcium = Measured calcium + 0.8 × (4 − Albumin).
Example
A measured calcium of 8.0 mg/dL with albumin of 2.5 g/dL: 8.0 + 0.8×(4−2.5) = 8.0+1.2 = 9.2 mg/dL corrected.
Frequently asked questions
How is Result calculated?
Result = [Measured calcium] + 0.8 × (4 − [Albumin]).
Is the Corrected Calcium Calculator free to use?
Yes — every calculator on Simple Calculator Tools is free, runs in your browser, and does not require an account.
Corrected Calcium Calculator
Corrected calcium = Measured calcium + 0.8 × (4 − Albumin).
Let's understand your corrected calcium result.
Calculate a result above and this guide will help you interpret it using this calculator's own formula and explanation.
Pro Tips for Corrected Calcium
- This correction is most relevant when albumin is below the normal reference range (roughly 4 g/dL), which is common in illness and hospitalization.
- This is a widely used estimate but isn't perfectly precise — ionized calcium testing is more accurate when available and clinically important.
Common Corrected Calcium Mistakes to Avoid
- Applying this correction when albumin is already normal or high, where the adjustment isn't clinically meaningful or intended.
When to Use This Calculator
This calculator adjusts a measured calcium level for low albumin, since a large share of blood calcium is bound to albumin and low albumin can make total calcium appear falsely low.