Platelet cPRA Calculator

Prototype calculation using HLA-A and HLA-B donor antigens.

Prototype ABO rules: ABO-compatible and ABO-adjusted calculations currently use the compatibility matrix configured in includes/config.php. Confirm the platelet-specific compatibility rules before production use.

This calculator estimates platelet cPRA using unacceptable HLA-A and HLA-B antigens against the currently installed donor dataset.

Platelet HLA Donor Dataset Version: 2026-09-v03 Data as of: September 11, 2026 Donors: 10 ABO data: Available

Unacceptable HLA antigens

Enter or paste HLA-A and HLA-B antigens. You can also select them from the checklist.

Antigens

Spaces, commas, semicolons, pipes and new lines are accepted. After a locus is identified, following numbers inherit that locus: A3 11 B5 13 becomes A3, A11, B5, B13. You can also enter A: 3 11 29 B: 7 8 44. Friendly formats such as A*3 and B-44 are normalized.

Patient blood group

Select a blood group to calculate configured ABO-specific results.

Decimal precision

Controls only how many decimal places are displayed; it does not change the underlying donor calculation.

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