Health & Fitness
Corrected Calcium Calculator
Correct total serum calcium for abnormal albumin levels.
Preparing your result…
What this calculator does
Calculates Corrected Calcium Calculator using the formula verified against the cited source.
What your result means
An estimate from the inputs you enter, within the scope stated below — not advice.
Formula
Adjusted total calcium = measured Ca (mg/dL) + 0.8 × (4 − albumin g/dL); SI: Ca (mmol/L) + 0.02 × (40 − albumin g/L)
The step-by-step working for your own numbers appears with the result above and in the PDF report.
Frequently asked questions
Symbols and assumptions
- Inputs
- The values entered in the fields above
- • Conventional albumin-adjusted total calcium estimate: measured total Ca mg/dL+0.8×(4−albumin g/dL). SI equivalent: Ca mmol/L+0.02×(40−albumin g/L).
Sources and review
Reviewed 2026-10-18 · Next review 2027-04-18
- • Label an estimated adjusted total calcium, not ionized calcium. Correction can misclassify calcium status, particularly with severe hypoalbuminemia, renal/critical illness or abnormal pH. Do not present it as inherently more accurate than measured calcium; clinical assessment may require direct ionized calcium.
Important limitation
This is an educational estimate based only on the values and formula shown. Verify current rates, rules, units, and professional standards before relying on the result. It is not personalized financial or investment advice.
Quick reference
| Scenario | Measured total calcium | Albumin | Albumin-adjusted total calcium |
|---|---|---|---|
| Worked example | 8.5 | 3 | 9.3 mg/dL |
| Half the amounts | 4.25 | 1.5 | 6.25 mg/dL |
| Double the amounts | 17 | 6 | 15.4 mg/dL |
Need the full picture? Get the detailed PDF report with charts, tables, formulas and working steps.
Reviewed 2026-10-18 · Next review 2027-04-18
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