Lymphocytes (LYMPH %) and ALC Calculator

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The Lymphocyte Percentage (LYMPH %) indicates the proportion of lymphocytes relative to the total white blood cell (WBC) count. While the percentage itself is a simple conversion, its importance lies in calculating the Absolute Lymphocyte Count (ALC), which is the true measure of immune strength used clinically.

ALC Calculation Formula: ALC = WBC (× 10⁹/L) × LYMPH fraction

Input: Lymphocyte Percentage

Core Value

LYMPH %

Fraction (0.00 to 1.00)

Percentage of total WBCs.

Calculate Absolute Count (ALC)

Total WBC (× 10⁹ / L)

ALC (× 10⁹ / L)

ALC (× 10³ / µL)

Clinical Context

Clinical Importance: Lymphocyte percentage (LYMPH %) is used primarily for differential interpretation. For prognostic and diagnostic purposes (e.g., monitoring chemotherapy effects or diagnosing HIV/AIDS), the Absolute Lymphocyte Count (ALC) is mandatory.

Typical Ranges:
• Normal ALC: 1.0 – 4.8 × 10⁹ / L
• Lymphopenia (Severe): < 0.5 × 10⁹ / L

Clinical References

How to Use This Calculator

Use the percentage from your blood test along with the total WBC count.

Input Percent & WBC

Enter the Lymphocyte Percentage (e.g., 35) and the Total WBC count (e.g., 5.0) from your Complete Blood Count (CBC).

Calculate ALC

The calculator instantly determines the Absolute Lymphocyte Count in the clinical standard unit (× 10⁹ / L or × 10³ / µL).

Unit Equivalence

Note that 1 × 10⁹ / L is numerically identical to 1 × 10³ / µL.

Disclaimer: This calculator is provided for educational and reference purposes only. It is not intended for clinical diagnosis, treatment, or medical decision-making. Always consult a qualified healthcare professional and refer to your laboratory’s official reference ranges before interpretation.

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