Blood Type Resources
Essential information, guides, and references for understanding blood types
How to Find Your Blood Type
1. Check Your Medical Records
Your blood type may already be documented in:
- Previous blood donation records
- Hospital or surgical records
- Pregnancy records (routine testing during pregnancy)
- Military service records
- Birth records (some hospitals test newborns)
2. Ask Your Healthcare Provider
Your doctor can order a simple blood typing test during a regular check-up or blood draw. This is the most reliable method and the results will be added to your medical records.
3. Donate Blood
When you donate blood, the blood bank will test your blood type and notify you of the results. This is a free way to find out your blood type while helping others.
Note: Blood donation centers will typically inform you of your blood type within a few weeks after your donation.
4. Home Blood Type Testing Kits
At-home blood typing kits are available at pharmacies and online. These typically involve:
- Pricking your finger for a small blood sample
- Placing the blood on test cards with antibody reagents
- Reading the results based on clumping patterns
Important: Home tests can be less accurate than professional testing. Always verify results with a healthcare provider if the information is needed for medical purposes.
5. DNA Testing Services
Some DNA testing services (like 23andMe) can predict your blood type based on genetic markers, though this is typically less accurate than direct blood typing.
Medical References & Citations
Our blood type information is based on peer-reviewed medical literature and trusted healthcare sources:
American Red Cross Blood Services
Comprehensive information on blood types, compatibility, and donation guidelines.
National Institutes of Health (NIH)
Genetic inheritance patterns and blood group systems research.
Centers for Disease Control and Prevention (CDC)
Blood safety and transfusion guidelines.
World Health Organization (WHO)
Global blood type distribution data and blood safety standards.
International Society of Blood Transfusion (ISBT)
Blood group nomenclature and rare blood type registries.
Academic Foundation: The genetics of blood type inheritance follows Mendelian inheritance patterns as described in foundational genetics research. Our calculators use established Punnett square methodology to determine possible offspring blood types.
Printable Charts & Quick Reference
Access our interactive tools that can be used as quick reference guides:
Compatibility Matrix
Complete donor-recipient compatibility chart showing all 64 combinations
View Interactive Chart →Blood Type Frequency
Rarity percentages for all blood types with ethnic variations
View Rarity Data →Inheritance Chart
Visual guide showing all possible parent-child blood type combinations
View Inheritance Chart →Individual Blood Types
Detailed pages for each of the 8 blood types with key facts
Browse Blood Types →Tip: Use your browser's print function (Ctrl+P or Cmd+P) on any of these pages to create a physical copy for reference.
Educational Tools
Interesting Blood Type Topics
Blood Type & Mosquito Attraction
Discover the fascinating science behind why mosquitoes prefer certain blood types. Type O individuals get bitten 83% more often!
More Topics Coming Soon
We're constantly adding new blood type content including personality traits, diet information, and more.
Medical Disclaimer
This information is provided for educational purposes only and should not be used as a substitute for professional medical advice, diagnosis, or treatment. Always consult with a qualified healthcare provider for medical questions and before making any medical decisions. Blood type testing for medical purposes should only be performed by licensed medical professionals or certified laboratories.