Hematology Calculators
Hematology tools for corrected sodium in hyperglycemia and transtubular potassium gradient for electrolyte disorders.
This category currently includes 7 tools, including 4T Score (HIT), Revised Geneva, and Padua Score.
These resources are built for clinicians, trainees, and medically informed patients who need fast bedside calculations. Use the results as decision support and pair them with full clinical context and local guidelines.
All Hematology Tools (7)
4T Score (HIT)
Score HIT pretest probability with the validated 4T tool. Score ≤3: >99% NPV — HIT unlikely. Score ≥4: stop heparin and switch anticoagulants. Free clinical calculator.
Revised Geneva
Calculate the Revised Geneva Score to estimate clinical probability of pulmonary embolism.
Padua Score
Estimate venous thromboembolism risk in hospitalized medical patients using the Padua Prediction Score.
DIC Score
Estimate overt disseminated intravascular coagulation probability using the ISTH scoring framework.
NLR Ratio
Calculate NLR from absolute neutrophil and lymphocyte counts as an inflammatory and prognostic marker.
Mentzer Index
Calculate the Mentzer Index (MCV/RBC) to help screen iron deficiency anemia versus thalassemia trait in microcytosis.
PLR Ratio
Calculate PLR from platelet and absolute lymphocyte counts as an adjunct inflammatory marker.