Your CBC report, line by line
A CBC is the most-ordered blood test in India and the least explained. One tube, about fourteen lines, a few red arrows, and no one to ask what any of it meant. This is the same read a pathologist does — line by line, in the order your report prints them.
What is a CBC actually counting?
Your blood is a liquid with three families of cells floating in it, and a complete blood count counts all three from one purple-topped tube. Red cells carry oxygen. White cells handle infection and inflammation, and come in five types that are counted separately — that split is the differential. Platelets are the fragments that plug a leak and start a clot.
The analyzer then measures the size, weight and evenness of your red cells and prints those as indices: MCV, MCH, MCHC and RDW. Most of the useful detail in a CBC hides in those four lines, which is exactly where a reader's eye tends not to go.
How do I read every line on my CBC report?
The ranges below are the usual adult ones. Read them as orientation, then read the range printed beside your own value — ranges differ by method, by age, by sex and by pregnancy, and your report carries the one our analyzer is calibrated to.
| Line on your report | What it counts | Usual adult range | What a shift points at |
|---|---|---|---|
| Haemoglobin (Hb) | The oxygen-carrying protein inside red cells | M 13.0–17.0 · F 12.0–15.0 g/dL | Low is how anaemia is defined — the cause is a separate question |
| RBC count | How many red cells you have | M 4.5–5.5 · F 3.8–4.8 million/µL | Read with Hb and MCV, never alone |
| PCV / Haematocrit | The share of your blood that is cells, not liquid | M 40–50% · F 36–46% | Moves with hydration as well as with red cell mass |
| MCV | Average size of one red cell | 80–100 fL | Small points at iron; large points at B12 or folate |
| MCH | Average haemoglobin carried per cell | 27–32 pg | Falls alongside MCV when cells are pale and small |
| MCHC | How concentrated the haemoglobin is inside the cell | 32–36 g/dL | A steadier index; sharp shifts often mean a sample issue |
| RDW | How uneven your red cells are in size | 11.5–14.5% | Often the first index to move, before Hb does |
| TLC (WBC) | All white cells, counted together | 4,000–11,000 /µL | Rises with infection, but also with stress and steroids |
| Neutrophils | The first responders | 40–75% | The share that typically leads in a bacterial pattern |
| Lymphocytes | The longer-memory white cells | 20–40% | Often the share that leads in a viral pattern |
| Monocytes | The clean-up cells | 2–10% | Read with the rest of the differential, not on its own |
| Eosinophils | The allergy and parasite line | 1–6% | Rises with allergy and with worm infestations |
| Basophils | The rarest white cell | 0–1% | Almost always a small number; context decides |
| Platelets | The cells that plug a leak and start a clot | 1.5–4.5 lakh /µL | Falling counts with fever are watched closely in dengue season |
What do MCV and RDW say that haemoglobin doesn't?
Haemoglobin tells you how much oxygen-carrying protein you have. MCV and RDW start telling you why. Small cells — an MCV under about 80 fL — are the pattern a doctor usually follows with iron studies, though thalassaemia trait produces small cells too and is common enough across north India to be worth ruling in or out once in a lifetime. Large cells, over about 100 fL, send the question towards vitamin B12 and folate.
RDW is the quiet one. It measures how uneven your red cells are in size, and it often moves before haemoglobin does, because a body running short of iron makes new small cells beside the older normal ones. A normal MCV with a high RDW is what a mixed picture looks like.
My white cell count is high — is that an infection?
Sometimes, and often not. A total leucocyte count climbs with bacterial infection, but it also climbs with a steroid course, a hard workout that morning, pregnancy, smoking, a burn, or a bad night. The share matters more than the total: which of the five white-cell types is leading, read against your fever chart and how long you have felt unwell. Your doctor puts those together — a number by itself names nothing.
An eosinophil count above the usual band is the one most people in Kanpur see, and allergy and worm infestations are both ordinary reasons for it. A doctor may want an ESR or a CRP beside the CBC when the picture is slow and unclear.
What is a normal platelet count?
Between about 1.5 and 4.5 lakh per microlitre. In dengue season a falling count matters more than any single value, which is why a doctor asks for a repeat rather than reading one number. A low platelet count can also be an artefact — platelets clumping in the tube read as fewer than they are — so a low count here triggers a fresh look at the sample and a smear before anything is released. Barcoded samples, calibrated analyzers, pathologist review: that is the whole quality chain, and it is why a strange value gets checked instead of printed.
What do I do next?
A CBC at Apoorv Pathology is ₹300, needs no fasting, and comes back with every line above explained in your own report rather than left as a column of numbers. Home collection is charged separately and varies by area. We are registered under the UP Clinical Establishments Act.
Book a CBC in Kanpur → · See what an explained report looks like → · Anaemia and iron testing →