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What is a heart rate zone calculator?

A heart rate zone calculator estimates your five training zones in beats per minute based on your maximum heart rate. The zones range from light recovery to peak effort, helping you train at the right intensity for endurance, fat burning, or performance goals.

What is the Karvonen method and why enter resting heart rate?

The Karvonen method calculates zones from your heart rate reserve (max heart rate minus resting heart rate), which personalizes the result to your fitness level. Entering your resting heart rate makes the zones more accurate than using max heart rate alone.

Which heart rate zone burns the most fat?

Zone 2, roughly 60 to 70 percent of your max heart rate, uses the highest proportion of fat for fuel and is ideal for building aerobic base. Higher zones burn more total calories but rely more on carbohydrates.