when you give blood how much do they take
- Sorry, you are ineligible to donate. Thanks for your interest, but you can't donate until you're 16. Register below and we'll contact you to arrange an appointment after your 16th birthday. Find out more about age restrictions. Back Start over Register. When giving blood, how much blood do they take? Report Abuse. 1  They usually take a pint. 2  like not a lot... 3  The body contains 10 to 12 pints of blood a donation is approximately a pint.  A blood donation equals approximately one pint of 1  blood. They call it a pint, but it probably is less than that.  I can't give blood so I'm not 1  sure. Usually 1 2  pint. Yup,  1 Pint.