If you want to get the most out of your cardio training, understanding your heart rate zones can help you train smarter, not harder. The heart rate zone calculator here will show you which zone you should be in based on your age and fitness level, whether you’re aiming to burn fat, improve endurance, or boost overall cardiovascular health. Different zones target different benefits—from low-intensity fat burning to high-intensity performance training—so knowing where your heart rate should be can help you structure your workouts more effectively. Use the calculator to find your ideal heart rate zones and make sure you’re training at the right intensity for your goals.

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