QTc Interval Calculator
Calculate the corrected QT interval (QTc) using Bazett, Fridericia, and Framingham formulas from ECG values.
Input Parameters
Enter details for calculation.
Corrected QT (QTc)
Expert Tip
Normal QTc is < 440ms for men and < 460ms for women. QTc > 500ms increases risk of Torsades de Pointes.
Calculation Methodology & Details
Formula
Corrects the measured QT interval to account for heart rate variations.
Important Disclaimer
The calculations provided are for educational and general informational purposes only. They do not replace professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider.
How QTc is Calculated
Follow these steps to use this calculator:
Enter QT & HR
Input measured QT interval and heart rate.
Read Corrected Value
View QTc and safety evaluation.
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ℹ️ About this Calculation
This clinical cardiovascular calculator provides precise hemodynamics assessment, ischemic heart disease risk stratification, electrophysiology calculations, and vascular disease evaluation based on ACC/AHA guidelines.
Variable Glossary
Vascular & ECG Data
Systolic/diastolic blood pressure, pulse rate, ECG intervals (QT/RR), or ankle-brachial Doppler pressures.
Hemodynamic Scores
Mean arterial pressure (MAP), corrected QTc interval, ASCVD 10-year risk percentage, or ejection fraction.
How to Calculate Step-by-Step
Step 1
Input hemodynamic vitals, lab values, or ECG measurement parameters.
Step 2
Select patient demographics, clinical comorbidities, or exercise test responses.
Step 3
Review calculated risk scores, hemodynamic parameters, and clinical classification recommendations.