EKG Rate Calculator
This calculator helps you determine the heart rate from an electrocardiogram (EKG) tracing. Accurate heart rate calculation is crucial for diagnosing various cardiac conditions.
R-R Interval (in small boxes):
Duration of Each Small Box (seconds):
Calculate Rate
.ekg-rate-calculator {
font-family: sans-serif;
border: 1px solid #ccc;
padding: 20px;
border-radius: 8px;
max-width: 400px;
margin: 20px auto;
background-color: #f9f9f9;
}
.ekg-rate-calculator h2 {
text-align: center;
color: #333;
margin-bottom: 15px;
}
.ekg-rate-calculator p {
font-size: 0.9em;
color: #555;
text-align: justify;
margin-bottom: 20px;
}
.input-section {
margin-bottom: 20px;
}
.input-section label {
display: block;
margin-bottom: 8px;
font-weight: bold;
color: #444;
}
.input-section input[type="number"] {
width: calc(100% – 22px);
padding: 10px;
margin-bottom: 15px;
border: 1px solid #ccc;
border-radius: 4px;
box-sizing: border-box;
}
.input-section input[type="number"]:focus {
border-color: #007bff;
outline: none;
}
button {
display: block;
width: 100%;
padding: 12px;
background-color: #007bff;
color: white;
border: none;
border-radius: 4px;
font-size: 1em;
cursor: pointer;
transition: background-color 0.3s ease;
}
button:hover {
background-color: #0056b3;
}
#result {
margin-top: 25px;
padding: 15px;
background-color: #e9ecef;
border: 1px solid #dee2e6;
border-radius: 4px;
text-align: center;
font-size: 1.1em;
font-weight: bold;
color: #333;
}
#result:empty {
display: none;
}
function calculateEkgRate() {
var rWaveIntervalInput = document.getElementById("rWaveInterval");
var smallBoxDurationInput = document.getElementById("smallBoxDuration");
var resultDiv = document.getElementById("result");
var rWaveInterval = parseFloat(rWaveIntervalInput.value);
var smallBoxDuration = parseFloat(smallBoxDurationInput.value);
if (isNaN(rWaveInterval) || isNaN(smallBoxDuration) || rWaveInterval <= 0 || smallBoxDuration <= 0) {
resultDiv.innerHTML = "Please enter valid positive numbers for R-R interval and small box duration.";
return;
}
// Calculation for EKG Rate (Heart Rate)
// Method 1: Using R-R Interval in Small Boxes
// Heart Rate (bpm) = 1500 / (Number of small boxes between R-waves)
var rate = 1500 / rWaveInterval;
// Method 2: Using R-R Interval duration in seconds
// Heart Rate (bpm) = 60 seconds / (R-R interval in seconds)
// var rrIntervalSeconds = rWaveInterval * smallBoxDuration;
// var rate = 60 / rrIntervalSeconds;
resultDiv.innerHTML = "Estimated Heart Rate: " + rate.toFixed(2) + " bpm";
}