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医療DoctorMedical Laboratory Scientist

Corrected Calcium Calculator

Calculate serum calcium levels corrected for albumin, providing a more accurate reflection of physiologically active calcium.

Calcium is essential for bone health, nerve signaling, and muscle function. However, standard lab tests measure 'total' calcium, which includes calcium bound to proteins like albumin. If albumin is low, the total calcium result can be misleading. This calculator 'corrects' the calcium level to show what it would be if the patient had normal albumin levels.

Educational use only. This tool does not replace clinical judgment or local protocols.

Albumin input stays g/L; conversion handled automatically.

Corrected calcium

2.2mmol/L

Corrected Calcium is 2.2 mmol/L

Ca + 0.02 * (40 - Alb) = 2.1 + 0.02 * (40 - 35)
Measured calcium2.1 mmol/L
Albumin (g/L)35 g/L
Unitsmmol/L

使い方

The tool uses the standard Payne formula, which adds a correction factor for every unit that the patient's albumin is below the normal reference (usually 4.0 g/dL or 40 g/L).

計算式

Ca_corrected = Measured_Ca + 0.8 × (4.0 - Albumin)

Calculation Examples

1. **Low Albumin**: Measured Calcium 8.0 mg/dL, Albumin 2.5 g/dL. Corrected Calcium = **9.2 mg/dL** (Normal).

Why use this tool in your daily life?

Avoid unnecessary treatments. This service prevents the dangerous and costly administration of IV calcium to patients who don't actually need it, keeping electrolyte management safe and evidence-based.

Frequently Asked Questions

ヒント

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