Stethoscope Heart Rate Calculator
Accurately determine Beats Per Minute (BPM) using manual auscultation.
10 Seconds
15 Seconds
30 Seconds
60 Seconds (Full Minute)
Calculated Heart Rate:
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BPM
How to Calculate Heart Rate Using a Stethoscope
Using a stethoscope (auscultation) is one of the most accurate ways to measure a resting heart rate because it allows you to hear the actual closure of the heart valves (the "lub-dub" sound) rather than just feeling a pressure wave at the wrist.
Step-by-Step Measurement Guide
- Preparation: Ensure the individual is resting quietly for at least 5 minutes before the measurement.
- Placement: Place the diaphragm (the flat side) of the stethoscope on the left side of the chest, specifically at the fourth to fifth intercostal space (between the ribs) at the midclavicular line. This is the apex of the heart.
- Listen: Adjust the earpieces so they point forward into your ear canals. Listen for the rhythmic "lub-dub" sound. Each "lub-dub" sequence counts as one beat.
- Count: Using a watch or timer, count the number of beats you hear over a specific interval.
- For an irregular rhythm, always count for a full 60 seconds.
- For a regular rhythm, counting for 15 seconds and multiplying by 4 is common practice.
The Mathematical Formula
(Number of Beats ÷ Seconds Measured) × 60 = Beats Per Minute (BPM)
Normal Heart Rate Ranges (Resting)
| Age Group | Normal Range (BPM) |
|---|---|
| Adults (18+) | 60 – 100 BPM |
| Children (6 – 15 years) | 70 – 100 BPM |
| Infants (1 – 12 months) | 80 – 160 BPM |
Disclaimer: This tool is for educational purposes only. If you have concerns about your heart rate or are experiencing symptoms like chest pain or dizziness, consult a medical professional immediately.