QTc Calculator

Free calculate QTc (corrected QT interval). This is an educational tool only - always consult a healthcare provider.

ECG Values

Or enter heart rate (bpm) below

Results

Enter values to calculate QTc

About QTc

  • • Normal: <440 ms (men), <460 ms (women)
  • • Borderline: 440-460 ms (men), 460-480 ms (women)
  • • Prolonged: >460 ms (men), >480 ms (women)
  • • Bazett: QTc = QT / √RR
  • • Fridericia: QTc = QT / ∛RR
  • • Framingham: QTc = QT + 0.154(1-RR)