heart rate Archives - Smart Online Doctor

Corrected QT (QTc) Calculator

24/07/2025 by Son Doctor

Medical Calculator – SonDoctor.com × Corrected QT (QTc) Calculator Adjust QT interval based on heart rate Bazett formula: QTc = QT / √RR Fridericia formula: QTc = QT / 3√RR Framingham formula: QTc = QT + 154 x (1 – RR) Hodges formula: QTc = QT + 1.75 x (HR – 60) Rautaharju formula: QTc … Read more

ECG Heart Rate Calculator (Calculate BPM from RR Interval)

24/07/2025 by Son Doctor

Medical Calculator – SonDoctor.com × ECG Heart Rate Calculator (Calculate BPM from RR Interval) Enter the number of small boxes (mm) between R waves. Heart Rate [bpm] = (Paper Speed [mm/sec] × 60) / RR Interval [mm] R-R interval (mm): Paper speed (mm/sec): How to Use the ECG Heart Rate Calculator