A little knowledge. A lot of good.
Understand your blood group, know what to expect, and feel ready for your next donation.
Who can your blood help?
Choose a blood group. Then explore giving or receiving red blood cells.
O+
Selected blood group
Can give to
These groups can receive your red cells
- A+
- B+
- AB+
- O+
This shows basic ABO and RhD red-cell compatibility. Plasma and platelets follow different rules. A blood centre must test and cross-match blood before transfusion; a match here does not confirm donor eligibility. Compatibility source
The letters and the signs, made simple.
A, B, AB, or O
These letters describe A and B markers on red blood cells. A has A markers, B has B, AB has both, and O has neither.
Positive or negative
The + or − tells you whether the RhD marker is present. Other blood markers matter too, which is why laboratory matching is essential.
Every group matters
Different patients need different blood components. O− red cells can be useful in emergencies, but every blood group is needed.
What happens when you donate?
A private conversation
The team asks about your health, medicines, and donation history. Tell them about recent illness, procedures, or anything you are unsure about.
A health check
Staff check your haemoglobin and other health measures. The medical team decides whether it is safe for you to donate that day.
Your donation
A trained professional uses sterile, single-use equipment. Tell the team immediately if you feel uncomfortable or unwell.
A little time to recover
Rest, enjoy a snack, and follow the centre’s advice before heading home. There is no need to rush.
How much, and how often?
These are general Indian whole-blood donation guidelines, not a personal eligibility check. The authorised blood centre chooses the collection volume and your next donation date.
350 / 450 mL
Usual collection volumes
The medical team selects the volume for your weight and health. Do not choose a volume for yourself.
90 / 120 days
Minimum whole-blood intervals
Indian guidance generally uses 90 days for men and 120 days for women. Some donors need longer; ask the centre.
18+
Start with a health assessment
Age alone is not enough. Weight, haemoglobin, medical history, and other screening checks all matter.
Before you give
Sleep well
Get a good night’s sleep before your appointment.
Eat and drink
Have a normal meal and drink water. Do not arrive on an empty stomach.
Bring the details
Carry identification and share your medicines, recent health history, and previous donation date.
Ask when unsure
Check with the centre about illness, pregnancy, recent procedures, tattoos, travel, or medicines. Do not stop prescribed treatment to donate.
After you give
Rest first
Stay for refreshments and leave only when you feel well and the team is happy for you to go.
Keep drinking water
Drink extra fluids and eat regular meals. Avoid alcohol for the next 24 hours.
Take it easy
Avoid heavy lifting and strenuous exercise for the rest of the day. Follow the centre’s bandage instructions.
Feeling faint?
Stop, lie down, and tell someone. Contact the donation centre if symptoms persist; seek urgent medical care for severe symptoms.
A blood group is a starting point, not a green light.
Always donate through an authorised blood centre. Screening, collection, testing, and compatibility decisions belong with qualified professionals. For an urgent blood requirement, contact your treating hospital directly.
A guide you can trace back
Based on guidance from Indian blood services, NHS Blood and Transplant, and the American Red Cross. Your donation centre’s instructions come first.