ECG Heart Rate Calculator (Calculate BPM from RR Interval)
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