QTc Interval Calculator (Corrected QT)
Calculate corrected QT interval using Bazett, Fridericia, Framingham, and Hodges formulas. Essential drug safety check before prescribing QT-prolonging medications.
ms
bpm
★ DoctorScribe — Complete Clinic Management
Don't rely on memory for 200+ QT-prolonging drugs
DoctorScribe's drug database flags QT risk the moment you select azithromycin, citalopram, ondansetron, haloperidol, fluconazole, methadone, or any other CredibleMeds-listed drug. Built-in patient safety.
Clinical Disclaimer: Bazett formula overcorrects at high heart rates and undercorrects at low rates. Fridericia is more accurate for HR <60 or >100. Always interpret QTc in the context of clinical scenario, electrolytes (K, Mg, Ca), and concomitant medications. Always verify against your local prescribing reference and apply clinical judgment.
Get QT-prolongation alerts before you prescribe
DoctorScribe flags QT-prolonging drugs (azithromycin, ondansetron, citalopram, ondansetron, haloperidol, hydroxychloroquine + 100 more) the moment you write the prescription. Built-in safety net for every doctor.
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