Please use the information on this site as a general guide; an evaluation by a medical professional is the only way to determine blood donor eligibility. Before you donate for the first time, we recommend you read our Preparing to Donate page. Show Donors must:
Get the Consent Form
Male Donors 18-Years-Old or YoungerIf you are:4’7” or less4’8”4’9”4’10”4’11”5’ or tallerYou must weigh at least:130 lbs.126 lbs.123 lbs.118 lbs.114 lbs.110 lbs. Female Donors 18-Years-Old or YoungerIf you are:5’1” or less5’2”5’3”5’4”5’5”5’6” or tallerYou must weigh at least:133 lbs.129 lbs.124 lbs.120 lbs.115 lbs.110 lbs. Nonbinary Donors 18-Years-Old or YoungerIf you are:5’1” or less5’2”5’3”5’4”5’5”5’6” or tallerYou must weigh at least:133 lbs.129 lbs.124 lbs.120 lbs.115 lbs.110 lbs. Anyone 19-Years-Old or OlderFor all heights, you must weigh at least:110 lbs. The U.S Food and Drug Administration (FDA), in an attempt to ensure a safe blood supply, has imposed strict controls on who may donate. If you discover that you are not eligible to give blood, you can still save lives by providing blood for research, coordinating a blood drive within your organization, volunteering your time, or contributing financially. However you participate in our programs, you are helping maintain the health of our community. Thank you for your dedication. After viewing the Medical History Questionnaire and the common reasons for deferral below, if you have questions about your eligibility, contact us at (650) 723-7831. Medical HistoryYou will be asked to complete a Medical History Questionnaire each time you donate blood. Your honesty in answering these questions is a crucial part of the blood donation process. You may fill out your medical history questionnaire ahead of time on the day of your donation by using SBC preCheck™. Once you have completed your form, a Medical Historian will go over your questions and answers with you. They may ask for further information, and you will have the opportunity to ask any questions you may have. The Medical Historian will then determine, based on your answers, if you are eligible to donate blood that day. Here are some reasons why a donor may be permanently deferred: Deferral InformationSome people are very disappointed to find that they are not eligible to give blood. There are several reasons for — and even different types of — deferrals. Depending upon the reason, a deferral may be either temporary or permanent. On rare occasions, donors may be deferred for reasons not listed on our website or educational materials to protect the safety of the donors and/or patients. For example, an open wound may be cause for deferral, and donors should disclose if they have any wounds prior to donation for a safety assessment. Donors are always welcome to call SBC Resource Nurse at 650- 725-7336 with any questions they have about eligibility prior to donation. Please read below for more information about some of the common reasons for deferral. COVID-19COVID-19 is a new strain of the coronavirus that was first identified in late 2019 in Wuhan, Hubei Province, China. Symptoms of the virus include fever, cough and shortness of breath. SBC is taking a precautionary approach to better ensure the safety of individuals at our donation sites: We have a 14-day deferral for exposure... Read More MSM DeferralExplaining the MSM Deferral Due to FDA policies, men who have had sex with another man* in the past year will be deferred from donation for three months due to an increased risk of acquiring HIV infection. Note that this deferral period was decreased from one year on September 17, 2020 due to an updated... Read More TravelAnyone who has ever lived in or visited another country may have different deferral periods – this will all be reviewed in the donor screening process. Below are a few examples of common travel deferrals. If you have questions about your eligibility, contact us at (650) 723-7831. Blood Donors with Recent Travel to the Caribbean:… Read More HemoglobinDuring the Medical History part of your donation process, the Historian will take a small blood sample from your finger to test your hemoglobin, which is the oxygen-carrying molecule in your red blood cells. In order to get an accurate sample of your hemoglobin level, your hands must be warm. Try rubbing your hands together,… Read More TattoosYou will no longer be deferred for tattoos obtained in a California State regulated entity. At present, you will still be deferred for three months if you obtained a tattoo outside of California or in California in a non-regulated entity. This deferral period was reduced from 12 months on September 17, 2020, based on an… Read More MedicationsWhile many people assume that they are ineligible to donate blood if they take medications, this is simply not the case! While some medications would preclude you from donating, most medications — even those prescribed by a doctor — pose no threat to you or patients as part of the blood donation process. There are… Read More Emerging Infectious DiseasesPlease do not donate if you have EVER had Ebola virus infection or disease. Please do not donate for 4 weeks after full recovery if you have been diagnosed with an infection of chikungunya or dengue. If you have been diagnosed with one of the above infections within the timeframe specified, or if you have… Can you donate blood if you weigh 90 pounds?Be in good general health and feeling well. Be at least 17 years old in most states (16 years old with parental consent in some states). Weigh at least 110 lbs.
How much do you have to weigh to give double blood?People with O type blood and those with certain Rh negative blood types are encouraged to donate double red blood cells because it is their red cells that are in the highest demand by the hospitals. Who is eligible to donate double red blood cells? Must weigh at least 130 pounds and be 5'1” or taller.
Why can't you give blood if you weigh less than 50kg?You must weigh at least 50kg (7 stone 12 lbs) for blood donation. This is so the volume of blood donated will be less than 15 per cent of your circulating blood volume. Taking a greater proportion would cause problems because the body would not be able to adjust quickly enough.
How much plasma can you donate by weight?Donation volume limits, set by FDA memorandum, are weight dependent. The collection volume (SP and anticoagulant) for a donor 110-149 lbs is 690 ml; 150-174 lbs, 825 ml; and 175+ lbs, 880 ml. Donor distributions are presented. Knowledge of Source Plasma (SP) donor demographics sheds light on the SP collection industry.
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Is there a weight limit to donate blood
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