How to Calculate My Heart Rate

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Heart Rate Calculator

Understanding your heart rate is crucial for monitoring your cardiovascular health and gauging exercise intensity. Your heart rate, measured in beats per minute (BPM), fluctuates based on your activity level, stress, and overall fitness. There are several types of heart rates to consider:

  • Resting Heart Rate (RHR): This is the number of times your heart beats in one minute when you are completely at rest. A lower RHR generally indicates better cardiovascular fitness.
  • Maximum Heart Rate (MHR): This is the highest number of times your heart can beat in one minute during maximal physical exertion. A common formula to estimate MHR is 220 minus your age.
  • Target Heart Rate Zone: This is a range of heartbeats per minute that you should aim for during aerobic exercise. It's typically expressed as a percentage of your MHR. The American Heart Association recommends a target zone of 50% to 85% of your MHR for moderate to vigorous activity.

This calculator helps you estimate your maximum heart rate and determine your target heart rate zone for exercise.

Enter a percentage (e.g., 50 for moderate, 85 for vigorous).

Your Heart Rate Results:

Estimated Maximum Heart Rate: — BPM

Target Heart Rate for —% Intensity: — BPM

.calculator-wrapper { font-family: sans-serif; padding: 20px; border: 1px solid #e0e0e0; border-radius: 8px; max-width: 500px; margin: 20px auto; background-color: #f9f9f9; } .calculator-wrapper h2 { text-align: center; color: #333; margin-bottom: 15px; } .calculator-wrapper p { color: #555; line-height: 1.6; margin-bottom: 10px; } .calculator-wrapper ul { margin-bottom: 15px; padding-left: 20px; } .calculator-wrapper li { margin-bottom: 5px; color: #555; } .form-group { margin-bottom: 15px; } .form-group label { display: block; margin-bottom: 5px; font-weight: bold; color: #333; } .form-group input[type="number"] { width: calc(100% – 22px); padding: 10px; border: 1px solid #ccc; border-radius: 4px; box-sizing: border-box; } .form-group small { display: block; color: #777; font-size: 0.85em; margin-top: 5px; } button { display: block; width: 100%; padding: 12px; background-color: #007bff; color: white; border: none; border-radius: 4px; font-size: 16px; cursor: pointer; transition: background-color 0.3s ease; margin-top: 10px; } button:hover { background-color: #0056b3; } #result { margin-top: 25px; padding: 15px; border: 1px solid #e0e0e0; border-radius: 4px; background-color: #fff; } #result h3 { color: #007bff; margin-top: 0; margin-bottom: 10px; } #result p { margin-bottom: 8px; color: #333; } #result span { font-weight: bold; } function calculateHeartRate() { var ageInput = document.getElementById("age"); var intensityInput = document.getElementById("intensity"); var age = parseFloat(ageInput.value); var intensity = parseFloat(intensityInput.value); var maxHeartRateSpan = document.getElementById("maxHeartRate"); var targetHeartRateSpan = document.getElementById("targetHeartRate"); var intensityValueSpan = document.getElementById("intensityValue"); // Clear previous results maxHeartRateSpan.textContent = "–"; targetHeartRateSpan.textContent = "–"; intensityValueSpan.textContent = "–"; if (isNaN(age) || age = 120) { alert("Please enter a valid age (between 1 and 119 years)."); return; } if (isNaN(intensity) || intensity 100) { alert("Please enter a valid intensity percentage (between 1% and 100%)."); return; } // Calculate Estimated Maximum Heart Rate (MHR) var estimatedMHR = 220 – age; // Calculate Target Heart Rate var targetHR = (intensity / 100) * estimatedMHR; // Display results maxHeartRateSpan.textContent = estimatedMHR.toFixed(0); targetHeartRateSpan.textContent = targetHR.toFixed(0); intensityValueSpan.textContent = intensity.toFixed(0); }

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