Is WBC 3.77 low, normal or dangerous? What does White blood cell count level 3.77 mean?

📅 Medical Review Date: December 4, 2025

Your WBC level of 3.77 is a Low WBC level.

A WBC level of 3.77 thou/uL usually means the immune system is suppressed or the bone marrow is not producing enough white blood cells. It suggests leukopenia. Low levels of WBC can cause frequent infections, fever, chills, sore throat, mouth sores, and slow healing of wounds. This can be caused by bone marrow disorders, chemotherapy, radiation, autoimmune diseases, or severe viral infections. Further tests are often needed to identify the cause and guide appropriate treatment.

Low WBC levels may indicate underlying health problems. The normal range is typically between 4 thou/uL and 11 thou/uL. If your levels are outside this range, it's important to speak with a healthcare provider. Consulting a doctor is recommended to determine the cause and appropriate next steps.

The normal WBC range for men is :4 - 11 thou/uL

Ideal values of WBC depending on age (male) :

Age	Ideal WBC value
<5 years	4.151
5-10 years	4.307
10-15 years	4.469
15-20 years	4.637
20-25 years	4.812
25-30 years	4.993
30-35 years	5.181
35-40 years	5.376
40-45 years	5.579
45-50 years	5.789
50-55 years	6.007
55-60 years	6.233
60-70 years	6.468
70-80 years	6.712
80-90 years	6.965
90-100 years	7.228
>100 years	7.5

*Ideal values are calculated based on our database of patient records

Get Advice via Email : Send us your blood test report, and our WBC experts will review it. You'll receive a detailed analysis and personalized treatment guidance via email within 12 hours. If you have additional blood test results besides WBC, please include those too—an accurate diagnosis often requires a full view of all abnormalities. Upload blood test report now

1,51,150

Total number of patients treated

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Some examples of conditions that increase or decrease WBC levels include:

• Infections, most commonly caused by bacteria and some viruses, less commonly by fungi or parasites
• Bone marrow damage
• Overwhelming infections (e.g., sepsis)
• Inflammation or inflammatory conditions such as vasculitis or inflammatory bowel disease
• Myelodysplastic syndrome

Receive world-class medical opinion about your low WBC levels over email.Upload blood test report now

Normal range of WBC found among women :4-11 thou/uL

Ideal values of WBC depending on age (female) :

Age	Ideal WBC value
<5 years	4.155
5-10 years	4.316
10-15 years	4.484
15-20 years	4.658
20-25 years	4.839
25-30 years	5.027
30-35 years	5.222
35-40 years	5.425
40-45 years	5.636
45-50 years	5.855
50-55 years	6.082
55-60 years	6.318
60-70 years	6.563
70-80 years	6.818
80-90 years	7.083
90-100 years	7.358
>100 years	7.644

If you take a WBC blood test and the results are not in the normal range (4-11 thou/uL), your physician may recommend more tests to figure out the problem. You might also get this test if your physician thinks you have some other disease.

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How the WBC Test Is Done :

When your doctor orders a WBC test, it involves a straightforward blood draw to measure your WBC levels. A pathologist or lab technician will take a small sample of blood from a vein using a needle. Your WBC test results are usually available within a few hours.

Medical References

• MedlinePlus – White Blood Count (WBC)
• Cleveland Clinic – White Blood Cells: Types, Function & Normal Ranges
• MedlinePlus – Blood Count Tests