UNOS technology
Allocation calculators

Organ allocation calculators

There are a number of mathematical formulas used in organ allocation. Allocation calculators are important tools that transplant professionals and patients use to determine various scores that influence a candidate’s priority on the waiting list and likelihood of receiving a transplant.

Learn more about allocation calculators



Find toolkits containing policy information, checklists, guidance, reports, and much more by organ type or topic:

Careers in organ donation and transplantation

Professional education

Find transplant professional education resources from UNOS.

Professional education resources

Maze with lightbulb illustration

Collaborative research: SimUNetSM

For donation and transplant professionals who want to increase transplant, SimUNet simulations offer a way to experiment with how different ways of displaying information (and how different types of information) can affect decision making.

Learn about SimUNet

TransNet and organ transport

Organ transport

Learn about TransNetSM, find upcoming TransNetSM training sessions, order organ labels and learn more about organ packaging, labeling and transport.

Learn more about organ transport

Careers in organ donation and transplantation

UNOS careers and transplant job postings

Find careers at UNOS, in the transplantation field, or post a transplant job.

View UNOS careers

Other resources

Living donation

Living organ donation

Learn more about living donation, including living donor requirements, informed consent, frequently asked questions, how to join the OPTN Kidney Paired Donation Pilot Project and more.

Living donation resources

Patient safety

Patient safety

Find resources to improve patient safety, such as precautions to prevent disease transmission, guidance for blood subtyping, information about vessels transplantation and tools for best practices, such as templates, corrective action plans and more.

Find patient safety resources

Calendar of events

Calendar of events

Find UNOS events, OPTN committee meetings and conference calls, and regional meetings.

Calendar of events

Glossary of organ donation and transplantation terms


Find definitions for transplantation and donation terms.

View glossary

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