›

›

White Blood Cells (WBC)

Blood

White Blood Cells (WBC)

WBC means white blood cell count: the number of infection-fighting white cells in a blood sample. It is commonly included in a complete blood count (CBC).

Also known as: Leukocytes, WCC, White Cell Count

COMMON RANGE

3.4 – 9.6

×10³/µL

2.31

14.2

M

Mayo Clinic Laboratories

Adult

See all sources ↓

CONVERT & COMPARE

×10³/µL

=

6.5

×10⁹/L

=

6500

cells/µL

Reference ranges by source

Published adult intervals: 6, from 6 named sources, shown in ×10³/µL.

SOURCE

SEX

AGE

RANGE

VISUAL

CITE

M

Mayo Clinic Laboratories

All

≥18y

3.4 – 9.6 ×10³/µL

L

Labcorp

All

≥18y

3.4 – 10.8 ×10³/µL

N

Nordic Reference Interval Project

All

≥18y

3.5 – 8.8 ×10³/µL

U

UK Pathology Harmony

All

≥18y

4 – 11 ×10³/µL

J

JSCC / JAMT Japan

All

≥18y

3.3 – 8.6 ×10³/µL

T

Turkey Nationwide Reference Intervals

All

≥18y

4.39 – 11.6 ×10³/µL

M

Mayo Clinic Laboratories

All · ≥18y

3.4 – 9.6 ×10³/µL

L

Labcorp

All · ≥18y

3.4 – 10.8 ×10³/µL

N

Nordic Reference Interval Project

All · ≥18y

3.5 – 8.8 ×10³/µL

U

UK Pathology Harmony

All · ≥18y

4 – 11 ×10³/µL

J

JSCC / JAMT Japan

All · ≥18y

3.3 – 8.6 ×10³/µL

T

Turkey Nationwide Reference Intervals

All · ≥18y

4.39 – 11.6 ×10³/µL

Ages 0–17 (CALIPER)

3 age- and sex-stratified entries from the Canadian Laboratory Initiative on Pediatric Reference Intervals.

SOURCE

SEX

AGE

RANGE

VISUAL

CITE

C

CALIPER: Canadian Pediatric Reference Intervals

All

0–3y

5.3 – 13.2 ×10³/µL

C

CALIPER: Canadian Pediatric Reference Intervals

All

3y–5y

4.8 – 11.5 ×10³/µL

C

CALIPER: Canadian Pediatric Reference Intervals

All

5y–21y

4.2 – 10.2 ×10³/µL

C

CALIPER: Canadian Pediatric Reference Intervals

All · 0–3y

5.3 – 13.2 ×10³/µL

C

CALIPER: Canadian Pediatric Reference Intervals

All · 3y–5y

4.8 – 11.5 ×10³/µL

C

CALIPER: Canadian Pediatric Reference Intervals

All · 5y–21y

4.2 – 10.2 ×10³/µL

How to read a WBC result

Start with the WBC value, unit and reference interval printed together on your report. The table below shows published intervals from different sources; its highlighted range is an example, not a replacement for your laboratory’s interval.

A total WBC count and a white-cell differential answer different questions. The total counts all white cells; the differential describes individual types. A high or low total alone cannot identify the cause.

Age, illness, medicines and other circumstances can affect interpretation. Keep the original report with previous results and discuss an unexpected change with your healthcare provider.

Explanation prepared by Joelis labs, UAB · Sources checked 2026-09-22

MedlinePlus: white blood count ↗

MedlinePlus: understanding lab results ↗

Track your white blood cells (wbc) in MyBloodTest

Save reviewed lab results and follow their history. Scanning requires sign-in and has plan-specific limits.

Download on the

Open the web app

iOS · Android · Web

Scan a lab report

Import past results

Related biomarkers

More tests in the blood category.

Red Blood Cells (RBC)

Hemoglobin (Hgb)

Hematocrit (Hct)

Platelets (PLT)

Mean Corpuscular Volume (MCV)

Mean Corpuscular Hemoglobin (MCH)

Sources

Mayo Clinic Laboratories

Nordic Reference Interval Project

UK Pathology Harmony

J

JSCC / JAMT Japan

T

Turkey Nationwide Reference Intervals

CALIPER: Canadian Pediatric Reference Intervals

Last updated 2026-05-02

This page presents source-specific reference data and sourced explanations. For general wellness information only. This is not medical advice. For diagnosis or treatment of any condition, talk to a qualified clinician.

© 2026 Joelis labs, UAB. All rights reserved.