AFib Heart Rate Calculator
Accurate BPM Monitoring for Atrial Fibrillation
Pro Tip: For Atrial Fibrillation, counting for a full 60 seconds is recommended because the rhythm is "irregularly irregular."
How to Calculate Heart Rate for Atrial Fibrillation
Calculating a heart rate when you have Atrial Fibrillation (AFib) is different from calculating a normal, steady pulse. Because AFib creates an irregularly irregular rhythm, the time between each heartbeat varies constantly. If you only count for 10 or 15 seconds, you might catch a "fast" cluster or a "slow" pause, leading to an inaccurate reading.
The Gold Standard: The 60-Second Method
Most clinicians recommend a full 60-second count to get an accurate average of your heart rate during AFib. To do this:
- Sit quietly for 5 minutes before checking.
- Place your index and middle fingers on your radial artery (wrist) or carotid artery (neck).
- Count every single beat you feel for one full minute on a clock.
- Use the calculator above to record the exact count.
Understanding Your Results
In AFib management, doctors often look for "rate control." The targets may vary based on your specific health plan:
| BPM Range | Classification |
|---|---|
| Below 60 BPM | Bradycardia (Slow) |
| 60 – 100 BPM | Normal Resting Range |
| Above 100 BPM | Tachycardia (Fast) |
| Above 110 BPM | Rapid Ventricular Response (RVR) potential |
Example Calculations
Example 1: You count 92 beats in 60 seconds. Your heart rate is exactly 92 BPM. This is within the normal resting range.
Example 2: You count 35 beats in 15 seconds. (35 x 4) = 140 BPM. This indicates a high heart rate, often associated with AFib with RVR, and you should follow your physician's protocol for high heart rates.
Disclaimer: This tool is for informational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician if you are experiencing palpitations, chest pain, or shortness of breath.