Home
Back
Heart Rate Formula:
| From: | To: |
The Heart Rate Calculator For ECG estimates heart rate from ECG readings by counting the number of large boxes between R waves. This method provides a quick and accurate assessment of heart rate from electrocardiogram tracings.
The calculator uses the ECG heart rate formula:
Where:
Explanation: Each large box on standard ECG paper represents 0.2 seconds. The formula calculates how many 0.2-second intervals occur in one minute (300) divided by the count of large boxes between R waves.
Details: Accurate heart rate calculation from ECG is essential for diagnosing arrhythmias, assessing cardiac function, monitoring treatment effectiveness, and identifying potentially dangerous heart rhythms.
Tips: Count the number of large boxes between two consecutive R waves on the ECG tracing. Enter this value in the calculator. The value must be greater than zero.
Q1: What is a normal resting heart rate?
A: For adults, normal resting heart rate ranges from 60-100 bpm. Well-trained athletes may have resting rates as low as 40 bpm.
Q2: How accurate is this method compared to other ECG heart rate calculations?
A: This method provides a quick estimate and is generally accurate for regular rhythms. For irregular rhythms, average several measurements.
Q3: What if the rhythm is irregular?
A: For irregular rhythms, take multiple measurements between different R waves and calculate an average heart rate for greater accuracy.
Q4: Can this calculator be used for pediatric patients?
A: Yes, the formula works the same way for all ages, though normal heart rate ranges differ for children.
Q5: What are the limitations of this calculation method?
A: This method is less accurate for very fast or very slow heart rates and should be verified with other methods when precise measurement is critical.