Platelet Count: Normal Range, Low and High Platelets

Typical reference ranges

Platelet count	Per µL (/cumm)	What it usually means
Above 450 ×10⁹/L	Above 450,000	High (thrombocytosis)
150–450 ×10⁹/L	150,000–450,000	Normal range
100–149 ×10⁹/L	100,000–149,000	Mildly low
50–99 ×10⁹/L	50,000–99,000	Moderately low
20–49 ×10⁹/L	20,000–49,000	Severely low: higher bleeding risk
Below 20 ×10⁹/L	Below 20,000	Very low: urgent review

Ranges based on: MedlinePlus; NHLBI; WHO. Full references are listed at the end of this page.

Use your own lab's range. Reference ranges differ between labs, analysers and methods, and with age, sex and pregnancy. The range printed on your report takes priority over the figures here.

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Common causes of low platelets

Viral infections, especially dengue, and also malaria and typhoid in endemic areas
Some medicines, including heparin, certain antibiotics and anti-epileptic drugs
Liver disease, where the spleen holds on to platelets
Immune thrombocytopenia (ITP), where the immune system destroys platelets
Pregnancy (mild drops are common late in pregnancy)
Bone marrow problems and vitamin B12 or folate deficiency

A falsely low count (pseudothrombocytopenia) happens when platelets clump in the sample tube. If the result doesn't fit how you feel, labs often repeat it in a different tube or check a blood film.

Platelets in dengue

In dengue the fever usually lasts 2–7 days. The critical phase starts when the fever settles and typically lasts 24–48 hours (CDC); this is when platelets are often lowest and complications appear, before the count recovers. The platelet count alone does not decide treatment: doctors also watch hematocrit, blood pressure and warning signs such as severe abdominal pain, persistent vomiting, bleeding and drowsiness. The WHO advises paracetamol for pain and fever and avoiding ibuprofen and aspirin, which raise bleeding risk.

Common causes of high platelets

Most high counts are reactive: infection, inflammation, iron deficiency, recent surgery or after removal of the spleen. Persistently very high counts without a clear reason can come from a bone marrow condition and need specialist review.

When to get help: Get same-day care for platelets below 20 ×10⁹/L (20,000/cumm), or any low count with bleeding gums, nosebleeds, blood in urine or stool, many new bruises or tiny red spots on the skin, or, in dengue, warning signs such as severe tummy pain or vomiting.

Frequently asked questions

What platelet count is dangerous?

Below about 20,000/cumm (20 ×10⁹/L) carries a risk of spontaneous bleeding and needs urgent review. Below 50,000 bleeding risk rises with injury or surgery.

What is the normal platelet count in lakh?

1.5 to 4.5 lakh per cumm.

Do papaya leaves raise platelets in dengue?

Some small studies suggest a modest effect, but evidence is limited. They are not a substitute for medical monitoring.

Can stress or exercise change the count?

Hard exercise can raise platelets slightly for a short time. It does not explain a low count.

Sources and references

Last reviewed 4 November 2026 by Dr Husain Farooq (medical doctor and biochemistry educator). This page is general health information, not a diagnosis or medical advice. Our medical editorial policy.

Platelet Count