🩸 ANC (Absolute Neutrophil Count) Calculator

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

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

Grade	ANC Range	Infection Risk
Normal	≥1500/μL	Generally not increased by ANC alone
Mild	1000-1499/μL	May be minimally increased
Moderate	500-999/μL	Increased
Severe	<500/μL	Significantly increased

These are general reference categories, not individual health guarantees. Reference ranges, baseline counts, and infection risk vary with clinical context.

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.

Commonly used clinical criteria for febrile neutropenia include an ANC below 500/μL together with a temperature of 38.3°C or higher (or 38.0°C sustained for over an hour). These criteria are not exclusive or a reason to wait before reporting fever or infection symptoms; the clinical team also assesses falling counts and the individual situation. Febrile neutropenia is a medical emergency requiring prompt clinical assessment and antibiotics as directed by qualified clinicians. The appropriate care setting depends on clinical risk assessment and local care pathways.

During periods of low ANC:
• Report fever, chills, sore throat, or other infection symptoms immediately
• Follow your care team's individualized infection-prevention advice
• Practice thorough hand hygiene and safe food handling, including avoiding particular raw or undercooked high-risk foods
• Get blood tests and follow-up as scheduled by your medical team