What is the WBC Calculator | White Blood Cell Count?

The WBC Calculator | White Blood Cell Count is a free online tool that helps you perform health calculations quickly and accurately. Simply enter your values and get instant results.

How do I use the WBC Calculator | White Blood Cell Count?

Enter the required values in the input fields, select your preferred units if applicable, and the calculator will automatically compute the results. The interface is designed to be intuitive and easy to use.

Is the WBC Calculator | White Blood Cell Count free to use?

Yes, the WBC Calculator | White Blood Cell Count is completely free to use. There are no hidden fees, subscriptions, or limitations on the number of calculations you can perform.

Can I use the WBC Calculator | White Blood Cell Count on mobile devices?

Yes, the WBC Calculator | White Blood Cell Count is fully responsive and works seamlessly on all devices including smartphones, tablets, and desktop computers.

How accurate is the WBC Calculator | White Blood Cell Count?

The WBC Calculator | White Blood Cell Count uses precise mathematical formulas and algorithms to ensure accurate results. However, always verify critical calculations with professional standards or consultants when needed.

Home/Health/White Blood Cell Calculator

White Blood Cell (WBC) Calculator

Assess white blood cell count with age-specific reference ranges

Enter WBC Count

WBC Count (×10³/µL or K/µL)

Also written as 10⁹/L (same numeric value)

Age Group

Reference Ranges

Your Range (adult)4.5 - 11.0 K/µL

Adult4.5 - 11.0 K/µL

Child5.0 - 14.5 K/µL

Newborn9.0 - 30.0 K/µL

WBC Differential (Normal Adult Values)

Cell Type	% of WBC	Absolute Count	Function
Neutrophils	40-70%	1.8-7.7 K/µL	Fight bacterial/fungal infections
Lymphocytes	20-40%	1.0-4.8 K/µL	Adaptive immunity (T & B cells)
Monocytes	2-8%	0.1-0.8 K/µL	Phagocytosis, become macrophages
Eosinophils	1-4%	0-0.4 K/µL	Parasites, allergic reactions
Basophils	0.5-1%	0-0.1 K/µL	Allergic/inflammatory responses

Causes of Low WBC (Leukopenia)

Bone Marrow Suppression

Chemotherapy / Radiation
Aplastic anemia
Myelodysplastic syndrome
Leukemia (paradoxically)

Infections

Viral (HIV, hepatitis, EBV)
Overwhelming bacterial sepsis
Tuberculosis

Other Causes

Autoimmune disorders (SLE)
Drug-induced (antibiotics, antipsychotics)
Nutritional deficiency (B12, folate)
Hypersplenism

Causes of High WBC (Leukocytosis)

Reactive (Common)

Bacterial infection
Inflammation / Tissue injury
Stress response (surgery, trauma)
Corticosteroid use
Smoking

Malignant

Acute leukemia (AML, ALL)
Chronic leukemia (CML, CLL)
Lymphoma with marrow involvement

Specific Patterns

Neutrophilia: bacterial infection
Lymphocytosis: viral infection, CLL
Eosinophilia: parasites, allergies
Monocytosis: chronic infection, recovery

Understanding White Blood Cells

What are WBCs?

White blood cells (leukocytes) are immune system cells that fight infection and disease. They are produced in bone marrow and circulate in blood and lymph.

The Differential

A WBC differential breaks down the types of white cells. The pattern helps identify bacterial vs viral infections, allergies, and blood cancers.

Left Shift

Increased immature neutrophils (bands) indicates acute bacterial infection. The bone marrow releases immature cells to fight infection.

Related Calculators

RBC Count Platelets Hemoglobin Anemia

Loading Calculator...

Please wait a moment

Cell Type

% of WBC

Absolute Count

Function

Neutrophils

40-70%

1.8-7.7 K/µL

Fight bacterial/fungal infections

Lymphocytes

20-40%

1.0-4.8 K/µL

Adaptive immunity (T & B cells)

Monocytes

2-8%

0.1-0.8 K/µL

Phagocytosis, become macrophages

Eosinophils

1-4%

0-0.4 K/µL

Parasites, allergic reactions

Basophils

0.5-1%

0-0.1 K/µL

Allergic/inflammatory responses