What It Measures#
A Complete Blood Count (CBC) is one of the most commonly ordered blood tests in India. It measures three major cell types in your blood:
- Red Blood Cells (RBCs) — carry oxygen from your lungs to every tissue in your body.
- White Blood Cells (WBCs) — form the backbone of your immune system and fight infections.
- Platelets — help your blood clot and prevent excessive bleeding.
A CBC also reports haemoglobin (Hb), haematocrit (HCT/PCV), and red-cell indices such as MCV, MCH, and MCHC. Doctors use it to screen for anaemia, infections, blood cancers, and nutritional deficiencies. It is often the first test ordered during a routine health check-up or when you feel persistently fatigued.
Who Should Get Tested#
- Adults above 30 as part of an annual health check-up.
- Pregnant women — at every trimester to monitor haemoglobin levels.
- People with chronic fatigue, unexplained weight loss, or frequent infections.
- Patients on chemotherapy or immunosuppressive drugs.
- Anyone with a family history of blood disorders such as thalassaemia.
Recommended frequency: Once a year for healthy adults; more often if you have a chronic condition.
How to Prepare#
- Fasting is usually not required for a standard CBC.
- Stay well-hydrated before the sample collection.
- Inform your doctor about medications such as blood thinners, steroids, or antibiotics, as they can alter WBC or platelet counts.
- Avoid strenuous exercise 24 hours before the test — intense workouts can temporarily raise WBC levels.
Understanding Your Results#
| Parameter | Normal Range (Indian Adults) | High May Indicate | Low May Indicate | |-----------|------------------------------|-------------------|------------------| | Haemoglobin | M: 13–17 g/dL; F: 12–15 g/dL | Dehydration, polycythaemia | Anaemia, nutritional deficiency | | WBC Count | 4,000–11,000 /µL | Infection, inflammation, leukaemia | Bone-marrow suppression, viral infection | | Platelet Count | 1.5–4.0 lakh /µL | Infection, inflammation | Dengue, ITP, liver disease | | RBC Count | M: 4.5–5.5 million/µL; F: 4.0–5.0 million/µL | Dehydration, lung disease | Anaemia, blood loss |
Always discuss your results with a qualified physician. Mild deviations may be normal for you based on age, gender, and altitude of residence.
Related Tests#
- Haemoglobin Test — focused measure of oxygen-carrying capacity.
- Iron Studies — helps differentiate types of anaemia.
- CRP Test — checks for underlying inflammation.
- Vitamin B12 Test — rules out megaloblastic anaemia.
Booking & Home Collection#
You can book a CBC test online on PingMeDoc with doorstep sample collection across major Indian cities. Results are typically available within 6–12 hours and are shared securely on your PingMeDoc health dashboard.