Designed for AFib and irregular pulse measurements
Count the number of pulses felt during the observation period.
6 Seconds (Multiplied by 10)
10 Seconds (Multiplied by 6)
15 Seconds (Multiplied by 4)
30 Seconds (Multiplied by 2)
60 Seconds (Full Minute)
Longer durations (30-60s) are more accurate for irregular rhythms.
Estimated Heart Rate:
0 BPM
Normal
Understanding Irregular Heart Rate Calculation
When dealing with an irregular heartbeat, such as Atrial Fibrillation (AFib) or premature ventricular contractions (PVCs), a standard 10-second pulse check often provides an inaccurate picture of your cardiovascular state. Because the intervals between beats vary, a "snapshot" can either overstate or understate your actual Beats Per Minute (BPM).
The 60-Second Gold Standard
For individuals with irregular rhythms, medical professionals generally recommend counting for a full 60 seconds. This averages out the pauses and "runs" of rapid beats. This calculator allows you to input shorter intervals but emphasizes that for high variability, longer observation windows are superior.
Calculation Formula
BPM = (Beats Counted / Seconds Observed) × 60
Example Calculation
Scenario: You feel an irregular rhythm and count 18 beats over a 15-second period.
Math: (18 / 15) = 1.2 beats per second.
Result: 1.2 × 60 = 72 BPM.
Important Medical Note: This tool is for informational purposes only. If you are experiencing chest pain, severe shortness of breath, dizziness, or a heart rate consistently above 100 or below 50 BPM at rest, seek immediate medical attention.
function calculateIrregularBPM() {
var beats = document.getElementById('beatsCount').value;
var seconds = document.getElementById('timeSeconds').value;
var resultBox = document.getElementById('hrResultBox');
var bpmValueText = document.getElementById('bpmValue');
var hrStatusText = document.getElementById('hrStatus');
if (beats === "" || beats <= 0) {
alert("Please enter a valid number of beats.");
return;
}
var bpm = Math.round((parseFloat(beats) / parseFloat(seconds)) * 60);
resultBox.style.display = "block";
bpmValueText.innerHTML = bpm + " BPM";
var status = "";
var color = "";
if (bpm = 60 && bpm <= 100) {
status = "Normal Resting Range";
color = "#2e7d32";
} else {
status = "Tachycardia (Fast)";
color = "#d32f2f";
}
hrStatusText.innerHTML = status;
hrStatusText.style.color = color;
}