🩸 ANC (Absolute Neutrophil Count) Calculator

Enter your white blood cell (WBC) count along with segmented (seg) and band neutrophil percentages to calculate the absolute neutrophil count (ANC) and check the neutropenia grade. Useful as a reference during chemotherapy or infection-risk assessment.

⚠️ Medical Disclaimer

This tool is for educational and reference purposes only and cannot replace medical diagnosis or treatment decisions. If you have fever, chills, or other signs of infection, or a low ANC during chemotherapy, do not interpret lab results yourself - contact your treating medical team immediately.

ANC (Absolute Neutrophil Count)

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Neutropenia Grade

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⚠️ Medical Disclaimer

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What Is ANC (Absolute Neutrophil Count)?

Neutrophils are the most common white blood cells that fight bacterial infection. The ANC is the total number of neutrophils per microliter of blood and is a key indicator of infection risk. It is monitored frequently during chemotherapy, bone marrow disorders, and autoimmune conditions.

ANC Calculation Formula

ANC = WBC × (% Segmented Neutrophils + % Band Neutrophils) ÷ 100

Example: WBC 6000/μL, segs 50%, bands 5%
ANC = 6000 × (50 + 5) ÷ 100 = 3300/μL

Neutropenia Grading

Grade	ANC Range	Infection Risk
Normal	≥1500/μL	No increase
Mild	1000-1499/μL	Minimal
Moderate	500-999/μL	Increased
Severe	<500/μL	Significantly increased

Causes of Neutropenia

Chemotherapy, radiation therapy, myelosuppressive drugs, bone marrow disorders (aplastic anemia, leukemia, etc.), viral infections, autoimmune disease, and vitamin B12/folate deficiency can all cause neutropenia.

Febrile Neutropenia (Emergency)

An ANC below 500/μL together with a temperature of 38.3°C or higher (or 38.0°C sustained for over an hour) is called febrile neutropenia. In chemotherapy patients this is treated as a medical emergency requiring immediate antibiotics and hospital evaluation.

Precautions for Chemotherapy Patients

During periods of low ANC, it is recommended to:
• Report fever, chills, sore throat, or other infection symptoms immediately
• Avoid crowds, raw foods, and other infection-risk factors
• Practice thorough hand hygiene
• Get regular blood tests as scheduled by your medical team

Frequently asked questions

Does a low ANC mean I need to go to the hospital right away?

If your ANC is low and you have fever, chills, or other infection symptoms, contact your medical team immediately or go to the emergency room. Fever combined with a low ANC during chemotherapy can indicate febrile neutropenia, a medical emergency. This calculator is for reference only, not a diagnosis.

Where do I find the segmented and band neutrophil percentages?

These are typically listed under the differential count on a complete blood count (CBC) lab report, as "Segs" (mature neutrophils) and "Bands" (immature neutrophils) in percent. Reporting formats vary by lab, so check with your medical team if unsure.

Can I use this calculator to adjust my own chemotherapy schedule?

No. Chemotherapy scheduling, dose adjustments, and antibiotic decisions must always be made by your treating oncology team. This tool is for education and reference only and should never be used to make treatment decisions.