Corrected Calcium Calculator
Calcium adjusted for low albumin.
Enter your values
Enter the serum calcium in mg/dL.
Enter the albumin in g/dL.
Results update instantly as you type — no submit needed. Your values are remembered on this device, and the shareable link reopens the calculator with exactly these numbers.
- Corrected calcium
- 9.08 mg/dL
- Measured calcium
- 8.2 mg/dL
- Correction applied
- 0.88 mg/dL
- Status
- Normal range
- In mmol/L
- 2.27
Quick answer
Low albumin lowers measured total calcium without changing ionised calcium, so correction adds 0.8 mg/dL per 1 g/dL albumin deficit.
Corrected = Ca + 0.8 × (4 − albumin)
At a glance
| What it does | Calcium adjusted for low albumin. |
|---|---|
| Category | Health |
| Inputs needed | Serum calcium, Albumin |
| Main output | Corrected calcium |
| Formula | Corrected = Ca + 0.8 × (4 − albumin) |
| Cost | Free — no sign-up, no download |
How to use the Corrected Calcium Calculator
- 1Enter serum calcium in mg/dL.
- 2Enter serum albumin in g/dL.
- 3Compare the corrected value with the normal range.
Inputs explained
- Serum calcium(mg/dL)
- Enter the serum calcium in mg/dL.
- Albumin(g/dL)
- Enter the albumin in g/dL.
Worked example
Using the values the calculator loads with:
Inputs
- Serum calcium8.2 mg/dL
- Albumin2.9 g/dL
Results
- Corrected calcium9.08 mg/dL
- Measured calcium8.2 mg/dL
- Correction applied0.88 mg/dL
- StatusNormal range
- In mmol/L2.27
Frequently asked questions
Is ionised calcium better?
Yes — direct ionised calcium measurement is the gold standard when available.
What is the normal range?
Roughly 8.5–10.5 mg/dL for total calcium.
What do I need to enter into the Corrected Calcium Calculator?
Just 2 values: serum calcium, albumin. Every field starts with a realistic example, so you can change one number at a time and watch the result update instantly.
How does the Corrected Calcium Calculator work out the answer?
Low albumin lowers measured total calcium without changing ionised calcium, so correction adds 0.8 mg/dL per 1 g/dL albumin deficit. It applies the formula Corrected = Ca + 0.8 × (4 − albumin) and shows the working so you can check each step by hand.
Is the Corrected Calcium Calculator free, and do I need an account?
It is completely free with no sign-up, no download and no usage limit. Everything is calculated in your browser, so the numbers you type never leave your device.
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.