Calculate Max Heart Rate for Exercise

Maximum Heart Rate Calculator

Your maximum heart rate is the highest number of times your heart can beat per minute during intense physical exercise. It's a crucial metric for setting safe and effective exercise intensity zones. The most common and simplest method to estimate your maximum heart rate is the age-based formula. While it's an estimate and individual variations exist, it provides a good starting point for understanding your training zones.

function calculateMaxHeartRate() { var ageInput = document.getElementById("age"); var resultDiv = document.getElementById("result"); // Clear previous results resultDiv.innerHTML = ""; var age = parseFloat(ageInput.value); if (isNaN(age) || age = 120) { resultDiv.innerHTML = "Please enter a valid age between 1 and 120."; return; } // The most common formula: 220 – Age var maxHeartRate = 220 – age; resultDiv.innerHTML = "

Estimated Maximum Heart Rate:

" + maxHeartRate.toFixed(0) + " beats per minute (bpm)"; } .calculator-container { font-family: sans-serif; border: 1px solid #ddd; padding: 20px; border-radius: 8px; max-width: 500px; margin: 20px auto; background-color: #f9f9f9; } .calculator-container h2 { text-align: center; margin-bottom: 20px; color: #333; } .calculator-inputs { margin-bottom: 20px; } .input-group { margin-bottom: 15px; display: flex; align-items: center; } .input-group label { margin-right: 10px; flex: 1; font-weight: bold; color: #555; } .input-group input[type="number"] { padding: 8px; border: 1px solid #ccc; border-radius: 4px; flex: 2; box-sizing: border-box; /* Include padding and border in the element's total width and height */ } button { display: block; width: 100%; padding: 10px 15px; background-color: #007bff; color: white; border: none; border-radius: 4px; font-size: 16px; cursor: pointer; transition: background-color 0.3s ease; } button:hover { background-color: #0056b3; } .calculator-result { margin-top: 20px; padding: 15px; background-color: #e9ecef; border: 1px solid #ced4da; border-radius: 4px; text-align: center; } .calculator-result h3 { margin-top: 0; color: #444; } .calculator-result p { font-size: 1.2em; font-weight: bold; color: #007bff; }

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