Blood facts and figures

Find out more on blood use and needs in Singapore.

Blood donation

Blood donation is a safe process. The average adult has 4 to 5 litres of blood. During a donation, only 350 to 450 ml of blood is drawn. About 8% to 12% of your blood volume (depending on your weight) will be taken during blood donation. The fluid (plasma) portion of your donated blood will be replaced in a few days.

Whole blood donations collect the blood with all its components, while apheresis donations collect specific blood components such as plasma or platelets.

In 2023, we collected 122,668 whole blood and 8,378 apheresis donations. View the Big Blood Picture 2023

Click here for the common misconceptions on blood donation.

About Singapore’s voluntary non-remunerated blood donation policy

In Singapore, blood donors donate blood or blood components such as platelets and plasma on their own free will and they do not receive any incentives for doing so. This is known as voluntary non-remunerated blood donation (VNRBD) and is the foundation of a safe and sustainable blood supply. This is aligned with the World Health Organisation and the International Federation of Red Cross and Red Crescent Societies.

Singapore’s VNRBD policy is in place to make sure that donors are honest about their medical history and any high-risk social activities they may have engaged in. If donors were paid or given incentives, they might be tempted to withhold important information. This could put both the donor and the person receiving the blood at risk.

Through altruistic blood donation, we also celebrate the value of being kind and generous to others. It is a way to help patients in need and make our society a better place.   

Blood components

Blood is made up of:

55% 45%
Plasma: the liquid portion of blood, containing mostly water, electrolytes, nutrients, and proteins such as antibodies and clotting factors.

  • Red blood cells: helps carry oxygen and carbon dioxide to organs and tissue
  • Platelets: helps blood clot
  • White blood cells: helps the body fight infections

Blood needs

In 2024, 14 units of blood are required every hour in Singapore. That is 325 units every day or 118,750 units in the year.

What blood is used for


Percentage (%)

Surgery (including trauma and heart surgery)


General Medicine


Haematology (blood diseases)




Obstetrics and Gynaecology




HSA keeps 9 days stockpile of blood supply to ensure sufficient blood supply during times of emergency.

Blood donors

In 2023, we had 77,424 donors. This was only 1.87% of the residential population.

22% were 1st time donors; 39% were regular donors and 15% were youth (25 years of age and below) donors.

  • The highest number of donations by a single person stands at 345
  • 31 donors have made their 200th donation
  • 93 donors have made their 100th donation

Collection by blood type

In 2023, we received the following % of blood types:

Blood Collection 2023
Blood type Percentage (%)
No. of AB+ donors (% of total donors) 5.8%
No. of AB- donors (% of total donors) 0.1%
No. of B+ donors (% of total donors) 24.1%
No. of B- donors (% of total donors) 0.3%
No. of A+ donors (% of total donors) 24.8%
No. of A- donors (% of total donors) 0.3%
No. of O+ donors (% of total donors) 44%
No. of O- donors (% of total donors) 0.6%