Platelets blood test
Platelet count
In short
A typical adult platelets result is 157 to 371 x10^3/µL for women and 135 to 317 x10^3/µL for men. A mildly high count is common and most often a reaction to something else, such as low iron, an infection or inflammation. It usually settles once the cause settles. Always read your result against the range printed on your own report.
Tiny cell pieces that help the blood clot.
Platelets are small cell fragments that plug leaks in blood vessels and help blood clot. Too few can make bruising or bleeding easier. Too many can, less often, raise the risk of clots.
Is my Platelets high or low?
Type your result to see where it sits.
Nothing you type leaves this device.
Typical range
| For | Range | Unit |
|---|---|---|
| Female | 157–371 | x10^3/µL |
| Male | 135–317 | x10^3/µL |
Typical ranges for adults. Labs differ a little, so the range printed next to your result is the one to go by.
If your Platelets is high
A mildly high count is common and most often a reaction to something else, such as low iron, an infection or inflammation. It usually settles once the cause settles.
Common reasons
- Low iron, including from heavy periods
- A recent infection or ongoing inflammation
- Recovery after bleeding, surgery or an injury
- Having had the spleen removed
- Less often: a bone marrow condition that makes too many platelets
- Less often: a reaction to a cancer elsewhere in the body
If your Platelets is low
A mildly low count is common, often temporary, and rarely causes bleeding. Doctors look at how low it is and whether it is falling.
Common reasons
- A recent viral illness
- Platelets clumping in the tube, which gives a falsely low count
- Pregnancy, when a mild drop is common
- Regular heavy drinking, or low vitamin B12 or folate
- Some medicines, including some antibiotics and some seizure medicines
- An immune reaction against platelets, or an enlarged spleen from liver disease
- Less often: a bone marrow condition
What can throw it off
Platelets can clump in the tube and read falsely low, so a surprising result is often simply repeated.
When it can’t wait
A Platelets of 1000 x10^3/µL or more, or 40 x10^3/µL or less, usually needs a doctor's attention the same day. Call your doctor’s office, or their after-hours line. If you feel very unwell, call your local emergency number.
Questions to take to your appointment
- 1Could the sample have clumped, and should it be repeated?
- 2Could my medicines or a recent illness explain it?
- 3At what level would this need action?
Read together with
Doctors rarely read Platelets alone. These usually sit next to it.
- MPVThe average size of your platelets.
- WBCThe total number of white blood cells, the body's infection fighters.
- HemoglobinThe protein in red blood cells that carries oxygen.
- FerritinThe body's iron-storage protein; its level mirrors your iron reserves.
- CRPA protein the liver makes when there is inflammation.
Quick answers
What is the platelets blood test?
Platelets (Platelet count): Tiny cell pieces that help the blood clot. Platelets are small cell fragments that plug leaks in blood vessels and help blood clot. Too few can make bruising or bleeding easier. Too many can, less often, raise the risk of clots.
What is a normal platelets level?
For most adults, platelets is typically 157 to 371 x10^3/µL for women and 135 to 317 x10^3/µL for men. Labs differ a little, so the range printed next to your result is the one to go by.
What does a high platelets mean?
A mildly high count is common and most often a reaction to something else, such as low iron, an infection or inflammation. It usually settles once the cause settles. Common reasons include low iron, including from heavy periods; a recent infection or ongoing inflammation; recovery after bleeding, surgery or an injury; and having had the spleen removed. A doctor reads it together with your other results and how you feel.
What does a low platelets mean?
A mildly low count is common, often temporary, and rarely causes bleeding. Doctors look at how low it is and whether it is falling. Common reasons include a recent viral illness; platelets clumping in the tube, which gives a falsely low count; pregnancy, when a mild drop is common; and regular heavy drinking, or low vitamin B12 or folate.
What can affect my platelets result?
Platelets can clump in the tube and read falsely low, so a surprising result is often simply repeated.
When is my platelets result urgent?
A platelets result of 1000 x10^3/µL or more, or 40 x10^3/µL or less usually needs a doctor's attention the same day. Call your doctor's office or their after-hours line. If you feel very unwell, call your local emergency number.
What should I ask my doctor about my platelets?
Questions worth taking to the appointment: Could the sample have clumped, and should it be repeated? Could my medicines or a recent illness explain it? At what level would this need action?
What this page can’t do
It reads each number on its own.
Doctors read results together — ALT with AST, ferritin with hemoglobin, TSH with free T4. A pattern says more than any single flag.
It doesn't know you.
Your age, your medicines, how you feel and your last result all change what a number means.
It doesn't remember.
Close this page and your results are gone. That's on purpose: nothing was ever sent to us.
We also make Vita: Health Coach, an app for those parts. It reads your whole report with your medicines and history in mind, answers follow-up questions in plain words, and keeps your reports in one place — for you and for the people you look after.
Vita: Health Coach on the App StoreSources
- Mayo Clinic Laboratories — CBC with differential, reference values
- Mayo Clinic Laboratories — Critical values list
- MedlinePlus — Complete blood count (CBC)
Stuck on a word? See the medical words. How we choose our sources. More about Vita Health Coach.