Hematology · Internal Medicine
Reticulocyte Production Index calculator
Enter the published formula inputs below to calculate and interpret this score.
Clinical inputs
Result
Complete all required inputs to calculate the score.
Formula inputs
- Reticulocyte percentage (%)Accepted range: 0 to 50
- Hematocrit (%)Accepted range: 5 to 60
Primary source
Pettit CL, Liebman HA. Laboratory evaluation of anemia. In: Hoffman R et al., Hematology. Primary maturation table in Brugnara C, Moran J. Hematology. DOI: 10.1016/B978-1-4377-2928-3.00035-6. PMID: 21422432. Scope: reticulocyte production index = [(reticulocyte % × patient hematocrit / 45)] divided by a maturation factor based on hematocrit (1.0 at ≥40%, up to 3.0 at <25%). (2013)
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