4T Score Calculator

Free calculate 4T score for heparin-induced thrombocytopenia (HIT) risk assessment. Get instant, accurate results with our easy-to-use calculator.

Clinical Criteria

1. Thrombocytopenia

2. Timing of Platelet Count Fall

3. Thrombosis or Other Sequelae

4. Other Causes for Thrombocytopenia

Enter clinical criteria to calculate 4T score

• Score 0-3: Low probability of HIT
• Score 4-5: Intermediate probability of HIT
• Score 6-8: High probability of HIT
• This tool is for clinical assessment only and should not replace professional medical judgment.