How long does it take your body to make blood?

Question

I just gave blood about 20 mins ago (about 3/4 of a pint). Just wondered if anyone knew how long it will take my body to re-make this blood?

Answer 1

Several weeks.

Answer 2

I not sure, but, when I was a very active Blood Donor, the Red Cross wanted me to donate two weeks after I had already donated. It was for an open heart surgery. Many were telling me, "you just gave"! But, I gave again and still alive.

8. How often can I donate?
You can donate whole blood as many as six times a year at intervals of 56 days, if you are in good health. You can donate platelets by apheresis every two weeks (up to 24 times in 12 months).
23. Isn't one pint of blood too much for me to give?
No. The average adult has 10 to 12 pints, and the donated unit is quickly replaced.
http://www.bloodsaveslives.org/donate/blooddonor.cfm

Answer 3

Your body start to make new blood cell right away. Once the blood has completely circulated around the body your heart will notice that there is a certain about of blood missing...there for your body start to remake the blood cells to replace what was taken.

So to remake blood is instantly....to completely replace what was taken...is unknown because it depends on how good your health is and how much was taken.