How to Measure Your Heart Rate with a Stethoscope: 10 Doctor-Approved Steps for Home Use

A resting adult heart typically beats around 60–100 beats per minute, but not everyone knows how to accurately check their heart rate. In fact, many people only discover an abnormal heart rate when symptoms like palpitations, rapid heartbeat, dizziness, or prolonged fatigue appear. Knowing how to use a medical stethoscope correctly will help you actively monitor your cardiovascular health at home, and also assist in early detection of changes that need to be evaluated by a doctor.

In this article, Tiptory will provide detailed instructions on how to measure heart rate with a stethoscope, starting from the most basic steps, including how to wear the stethoscope, precisely locating the correct position for listening to the heart with a stethoscope, counting heartbeats, and calculating beats per minute (BPM). With simple, easy-to-follow instructions, you will confidently monitor your heart rate safely and effectively.

Step 1: Choose an appropriate medical stethoscope

Choose a stethoscope that meets your needs

• If you don't have one, you should prepare a medical stethoscope before attempting to measure your heart rate with a stethoscope or monitor your heart rate at home.
• The primary purpose of self-measuring heart rate is to count the number of heartbeats per minute, so you don't need to invest in expensive specialized stethoscopes.

Prioritize a good quality stethoscope at a reasonable price

• A mid-range medical stethoscope is usually sufficient to hear heart sounds clearly if used correctly.
• You should choose models with stable sound transmission, ear tips that fit comfortably, and a secure grip to make listening to the heart with a stethoscope easier.

Consider a Sprague Rappaport type double-tube stethoscope

• If you're new, you might consider a double-tube stethoscope (Sprague Rappaport) as it's a popular, easy-to-use model that effectively meets the needs for measuring heart rate with a stethoscope.
• A price range of around 20–30 USD (equivalent to approximately 500,000–800,000 VND, depending on brand and seller) is usually enough to own a good quality stethoscope for home health monitoring.

No need to choose an overly expensive device

• High-end stethoscope models are typically designed for doctors to help detect very faint and complex heart or lung sounds.
• If your goal is simply how to use a medical stethoscope to count heartbeats or determine the correct position for listening to the heart with a stethoscope, a good quality common stethoscope model is an economical choice that fully meets your needs.

Step 2: Prepare a timer

Use a device that can accurately count seconds

• To measure heart rate with a stethoscope, you need a device that can track time by the second.
• Accurate timing helps you count the correct number of heartbeats within a specified period and calculate beats per minute (BPM).

Prefer an analog watch with a second hand

• A wristwatch or wall clock with a second hand will make counting heartbeats simpler.
• You just need to observe the position of the second hand when starting and ending the count, instead of having to count heartbeats and track each second simultaneously.

Digital clocks can also be used

• If you don't have an analog watch, you can still use a digital clock, smartphone, or stopwatch that displays seconds.
• When using these devices, focus on tracking time to avoid missing or miscounting heartbeats during the heart rate measurement with a stethoscope.

Count within the same time interval

• You should choose a fixed time interval, such as 30 seconds or 60 seconds, and apply it consistently for each measurement.
• Maintaining the same timing method will make the results of listening to the heart with a stethoscope more reliable and convenient for monitoring changes in heart rate over time.

Step 3: Remove thick clothing

Reduce layers of clothing before listening to the heart

• When measuring heart rate with a stethoscope, you need to place the chestpiece on your chest to listen to heart sounds.
• If you are wearing a jacket, thick sweater, or multiple layers of clothing, remove them to allow sound to transmit more clearly and to easily determine the correct position for listening to the heart with a stethoscope.

Thin clothing usually doesn't significantly affect sound

• With a good quality medical stethoscope, you can still hear heartbeats through 1–2 layers of thin t-shirt.
• However, the sound quality will not be as clear as when placing the chestpiece directly on the skin, especially if you want to count heartbeats accurately.

Place the chestpiece directly on the skin for best results

• If heart sounds are difficult to hear, place the chestpiece on the skin of your chest instead of over clothing.
• This method makes heart sounds clearer, reduces rustling noises from clothing friction, and supports more effective use of the medical stethoscope.

Check sound before starting to count beats

• Before counting heartbeats, adjust the chestpiece until you hear a clear, regular "lub-dub" sound.
• Only start timing when you have correctly identified the position for listening to the heart with a stethoscope, thereby helping to obtain more accurate and stable results when measuring heart rate with a stethoscope.

Step 4: Wear the stethoscope correctly

Position the eartips correctly

• When using a medical stethoscope, insert the eartips into your ears so that the tips are pointed forward, in the same direction as your face.
• This design helps the stethoscope seal the ear canal, transmit sound better, and supports more accurate heart rate measurement with a stethoscope.

Check for a snug fit before listening to the heart

• Once worn, the eartips should feel snug but comfortable, not causing pain or being too loose.
• If worn incorrectly, heart sounds may be faint, difficult to hear, or mixed with a lot of environmental noise.

Adjust for a more comfortable fit

• If the eartips don't fit well, you can gently adjust the angle of the metal tubes so that the eartips fit more snugly in your ears.
• Avoid bending too forcefully as this can bend or damage the stethoscope frame.

Check sound before starting the measurement

• Before determining the position for listening to the heart with a stethoscope, gently tap the chestpiece to check if the sound transmits clearly to both ears.
• When the sound is clear and the stethoscope is worn correctly, listening to the heart with a stethoscope will be easier, helping you count heartbeats accurately and minimize errors.

Step 5: Check the stethoscope before measuring

Identify the correct side of the chestpiece

• The part placed on the chest is called the chestpiece of the medical stethoscope.
• Many stethoscopes have two sides:
  • Diaphragm: The flat side with a plastic membrane, typically used for listening to high-frequency heart and lung sounds.
  • Bell: The small, bell-shaped side, suitable for listening to low-frequency sounds.

Ensure the chestpiece is in the correct mode

• At any given time, only one side of the chestpiece is active.
• If the chestpiece is rotated to the other side, no sound will transmit to your ears, even if you are wearing the stethoscope correctly.
• Rotate the chestpiece until you feel or hear a slight "click," indicating that the desired side is locked in position.

Check sound transmission capability

• After wearing the stethoscope, use your fingertip to gently tap or rub the diaphragm side.
• If you hear a clear sound transmitted to both ears, the stethoscope is working properly and ready for heart rate measurement with a stethoscope.

Troubleshoot when no sound is heard

• If you don't hear a sound when tapping the diaphragm, rotate the chestpiece to the other side and recheck.
• Also, check if the eartips are worn correctly and the chestpiece is locked in the right position.
• Performing this check before determining the position for listening to the heart with a stethoscope will help make the use of the medical stethoscope more effective and reduce errors in heart rate measurement.

Step 6: Place the chestpiece in the correct position

Identify the listening position on the chest

• To measure heart rate with a stethoscope, place the diaphragm side of the chestpiece firmly against the chest.
• You can imagine a horizontal line connecting the two nipples, then place the chestpiece slightly to the left of the midline of the chest. This position typically allows for clearer heart sounds.

Move gently to find the clearest listening point

• Each person has a different chest structure, so the position for listening to the heart with a stethoscope may vary slightly.
• Move the chestpiece in small increments and listen until you hear a clear, regular "lub-dub" sound.

Place the chestpiece firmly against the skin

• The chestpiece should be in direct contact with the skin to minimize friction sounds from clothing and improve sound quality.
• Do not press too hard as this can reduce sound transmission and make it harder to hear heart sounds.

Change position if difficult to hear

• If you still haven't found the correct heart auscultation position with a stethoscope, you can try:
  • Lying flat on your back, relaxed.
  • Slightly tilting or leaning forward.
  • Breathing normally and holding still for a few seconds while listening.
• These positions can help the heart lie closer to the chest wall, making it easier and more accurate to use a medical stethoscope to listen and count heartbeats.

Step 7: Prepare to count your heart rate

Prepare to start the timer before counting

• Once you have located the correct heart auscultation position with the stethoscope and can clearly hear the heart sounds, prepare a watch or timer with a second hand.
• Only start counting when the heart sounds are regular and clear to ensure a higher accuracy when measuring heart rate with a stethoscope.

Understanding heart sounds when listening

• When using a medical stethoscope, you will hear two consecutive sounds in each cardiac cycle, often described as "lub-dub".
• These two sounds reflect the opening and closing of heart valves during a complete contraction beat.

Each "lub-dub" cycle counts as one heartbeat

• Although you hear two consecutive sounds, you only count one heartbeat for each "lub-dub" cycle.
• In other words, count to the repeating rhythm: lub-dub (1), lub-dub (2), lub-dub (3)... instead of counting each sound separately.

Prioritize monitoring the first sound

• The "lub" sound is usually clearer and louder than the "dub" sound, making it easier to recognize when counting.
• To avoid confusion, focus on the first sound of each cycle and maintain a steady counting rhythm throughout the measurement. This is a simple yet very useful tip when first learning how to measure heart rate with a stethoscope.

Step 8: Count your heart rate correctly

Start counting when the second hand reaches an easy-to-remember mark

• Once you can clearly hear the heart sounds, observe the second hand on the clock.
• Start counting as soon as the second hand reaches an easy-to-remember mark like 12, 3, 6, or 9. This helps you determine the end time without having to track every second.

Count for 30 seconds for reliable results

• In clinical practice, healthcare professionals usually count heartbeats for 30 seconds, then convert the result to beats per minute (BPM).
• This is the minimum duration that provides a relatively high accuracy for heart rate measurement with a stethoscope.

No need to track every second while counting

• Instead of counting heartbeats and continuously tracking the second hand, you only need to remember the position the second hand will reach after 30 seconds.
• For example:
  • If you start when the second hand is at 12, stop when it reaches 6.
  • If you start at 2, end when it reaches 8.
• This method helps you focus more on the heart sounds and reduces counting errors.

Stop counting at the right time

• When the second hand reaches the exact end mark after 30 seconds, stop counting immediately.
• Then, use the counted heartbeats to calculate the heart rate per minute as instructed in the next step.

Count for 60 seconds for higher accuracy

• If your heart rate is irregular or you want to monitor your heart health more carefully, count continuously for 60 seconds.
• This method helps reduce errors and more accurately reflects the heart rate condition, especially when using a medical stethoscope for self-monitoring at home.

Step 9: Calculate heart rate per minute

Convert the result to BPM units

• After completing the heart rate measurement with a stethoscope, you need to convert the result to BPM (Beats Per Minute), which is the number of heartbeats in one minute.
• This is the standard unit used to assess and monitor heart rate in medicine.

Double the result if counting for 30 seconds

• If you count your heart rate for 30 seconds, multiply the result by 2 to calculate the heart rate per minute.
• For example:
  • Counted 36 beats in 30 seconds.
  • Result: 36 × 2 = 72 BPM.
• This means your heart beats approximately 72 beats per minute.

Multiply by four if only counting for 15 seconds

• In some cases where quick measurement is needed, you may only count for 15 seconds.
• In this case, multiply the number of beats by 4 to convert to BPM.
• For example:
  • Counted 18 beats in 15 seconds.
  • Result: 18 × 4 = 72 BPM.

Prioritize counting for 60 seconds when heart rate is irregular

• If your heart rate is unstable or you hear irregular intervals between beats, it is advisable to count continuously for 60 seconds.
• When counting for a full minute, the recorded number of beats is the BPM, with no conversion calculation needed.
• This is the most reliable method when using a medical stethoscope to monitor heart rate at home.

Measure multiple times to increase accuracy

• You should perform the measurement 2–3 times while at rest and take the average result.
• Repeated measurements help reduce errors due to technique or temporary heart rate changes, thus more accurately reflecting your heart health status.

Step 10: Re-measure to check results

Re-measure if results are abnormal

• Heart rate can vary with time of day, posture, stress levels, or physical activity.
• After measuring your heart rate with a stethoscope, if the result is significantly higher or lower than normal, you should perform one or more additional measurements to check.

Compare with your normal heart rate

• If the measured result differs by approximately 15–20 beats/minute (BPM) from your usual resting heart rate, do not jump to conclusions.
• Rest for a few minutes, relax your body, then use the medical stethoscope to re-measure under the same conditions.

Repeat until results are stable

• Perform measurements 2–3 times, with a few minutes between each.
• When the results are similar, you can consider that value to accurately reflect your current heart rate.

Ensure consistent measurement conditions

• To reduce errors, be sure to:
  • Measure at the same heart auscultation position with the stethoscope.
  • Maintain the same sitting or lying posture between measurements.
  • Avoid talking, exercising, or consuming coffee or smoking immediately before measuring.

Monitor if heart rate remains abnormal

• If multiple consecutive measurements show a heart rate that is consistently too fast, too slow, or irregular, especially when accompanied by symptoms such as dizziness, shortness of breath, chest pain, or fainting, you should seek medical attention for examination.
• Self-monitoring using a medical stethoscope helps detect early changes in heart rate but does not replace a doctor's examination and diagnosis when abnormalities are present.

Notes when listening to heart with a stethoscope

Do not place your thumb on the chest piece

• When holding the medical stethoscope, avoid placing your thumb on the diaphragm or the unused side.
• Your thumb has its own pulse, which can transmit vibrations to the chest piece and cause confusion when measuring heart rate with a stethoscope.
• Instead, hold the chest piece with your thumb and index finger on both edges to ensure a firm grip without affecting sound quality.

You can listen to the pulse at the elbow

• If it's not convenient to place the chest piece on the chest, you can listen to the pulse at the brachial artery on the inner side of the elbow.
• Follow these steps:
  • Extend your arm straight and keep your palm facing up.
  • Place the diaphragm in the elbow crease.
  • Gradually increase pressure until you clearly hear the pulse.
  • Count each beat to determine the heart rate.

Prioritize placing the chest piece directly on the skin

• For using a medical stethoscope to be most effective, place the chest piece directly on the skin.
• Clothing can create rustling noises and reduce the clarity of heart sounds, making it harder to determine the correct heart auscultation position with a stethoscope.

Don't worry if you hear breathing sounds

• During heart auscultation, you will also hear your own breathing sounds. This is completely normal.
• Focus on the "lub-dub" rhythm of the heart and disregard breathing sounds.
• Do not hold your breath to hear better, as this can temporarily alter your heart rate and affect the measurement results.

Note if you hear abnormal sounds

• If, in addition to normal heart sounds, you hear unusual sounds such as hissing, murmurs, or sounds occurring between the "lub-dub" beats, monitor closely.
• If these sounds occur frequently or are accompanied by symptoms such as chest pain, shortness of breath, palpitations, dizziness, or unusual fatigue, you should visit a medical facility for a doctor's examination.

Familiarize yourself with normal heart sounds

• If you are new to measuring heart rate with a stethoscope, you can refer to recordings of normal heart sounds from reputable medical sources.
• This will help you easily distinguish between physiological heart sounds and abnormal sounds when monitoring your health.

Avoid bumping the stethoscope head while wearing it

• While the earpieces are still in your ears, do not let the stethoscope head bump against tables, chairs, or hard objects.
• These vibrations will be transmitted directly to your ears at a high volume, causing discomfort and potentially startling you or affecting your hearing.

References

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8. JAMA Network. Auscultation of the Heart. JAMA Patient Page.
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12. MedlinePlus. Heart Sounds. U.S. National Library of Medicine.
13. StatPearls Publishing. Cardiac Auscultation. StatPearls Publishing; updated regularly.
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15. World Health Organization. Package of Essential Noncommunicable Disease Interventions (WHO PEN) for Primary Health Care. World Health Organization.

Content edited by: Ashley Wright Nguyen.

Information consulted and verified by expert: William Harris.