Calculate Target Heart Rate Zone

Target Heart Rate Zone Calculator

Understanding Your Target Heart Rate Zone

Your target heart rate zone is a range of your maximum heart rate that is safe and effective for exercise. Exercising within this zone helps you achieve specific fitness goals, whether it's improving cardiovascular health, increasing endurance, or burning fat.

How to Calculate Your Target Heart Rate Zone

There are a couple of common methods to determine your target heart rate zone.

Method 1: Using Maximum Heart Rate (MHR) Formula

The most common formula to estimate your Maximum Heart Rate (MHR) is: MHR = 220 – Age This is a general guideline, and actual MHR can vary.

Once you have your MHR, you can calculate your target heart rate zone. Generally, a moderate-intensity zone is 50% to 70% of your MHR, and a vigorous-intensity zone is 70% to 85% of your MHR.

  • Moderate Intensity Zone: 50% – 70% of MHR
  • Vigorous Intensity Zone: 70% – 85% of MHR

Method 2: Using a Known Maximum Heart Rate

If you have accurately determined your MHR through a stress test or other medical assessment, you can use that value directly.

The Calculator

Our calculator simplifies this process for you. Simply enter your age. If you happen to know your specific Maximum Heart Rate, you can enter that too for a more personalized result. The calculator will then provide you with your estimated moderate and vigorous target heart rate zones.

Why is it Important?

Exercising within your target heart rate zone ensures you're working out effectively without overexerting yourself.

  • Moderate intensity: You'll notice your breathing and heart rate increase, but you can still hold a conversation. This zone is great for building aerobic fitness and burning fat.
  • Vigorous intensity: You'll be breathing hard and fast, and it will be difficult to speak more than a few words. This zone is excellent for improving speed, strength, and athletic performance.

Always consult with your doctor before beginning any new exercise program, especially if you have pre-existing health conditions.

function calculateTargetHeartRateZone() { var ageInput = document.getElementById("age"); var maxHeartRateInput = document.getElementById("maxHeartRate"); var resultDiv = document.getElementById("result"); var age = parseFloat(ageInput.value); var knownMaxHeartRate = parseFloat(maxHeartRateInput.value); var calculatedMaxHeartRate; var moderateZoneMin; var moderateZoneMax; var vigorousZoneMin; var vigorousZoneMax; if (isNaN(age) || age 0) { calculatedMaxHeartRate = knownMaxHeartRate; } else { calculatedMaxHeartRate = 220 – age; } if (calculatedMaxHeartRate <= 0) { resultDiv.innerHTML = "Maximum heart rate cannot be zero or negative. Please check your inputs."; return; } moderateZoneMin = calculatedMaxHeartRate * 0.50; moderateZoneMax = calculatedMaxHeartRate * 0.70; vigorousZoneMin = calculatedMaxHeartRate * 0.70; vigorousZoneMax = calculatedMaxHeartRate * 0.85; resultDiv.innerHTML = "

Your Target Heart Rate Zones:

" + "Estimated Maximum Heart Rate: " + calculatedMaxHeartRate.toFixed(0) + " bpm" + "Moderate Intensity Zone: " + moderateZoneMin.toFixed(0) + " – " + moderateZoneMax.toFixed(0) + " bpm" + "Vigorous Intensity Zone: " + vigorousZoneMin.toFixed(0) + " – " + vigorousZoneMax.toFixed(0) + " bpm"; }

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