how long does it take to make up 1 pt of blood after donating
Report Abuse. A pint of blood lost, whether by accident or by donating blood, can be made up within 48 hours! That is, the fluid has been made up; but it is not advisable to donate blood oftener than once in 4 months, as that time is required for making up the red blood cells in the blood. pint is 300ml, the usual amount you would donate at a Blood Donor Camp. If you mean to ask by what time you are ready to donate again, then its 3 months. Body can make up for that 300ml in hours but you don't just donate the fluid part (made of water) but also the cells! SK Â· 9 years ago. Thumbs up.