Fat Burning Zone Calculator

The fat burning zone is the heart rate range (typically 60-70% of max HR) where your body uses the highest percentage of fat as fuel. At this moderate intensity, about 60% of calories burned come from fat compared to 35% at higher intensities.

Not necessarily. While a higher percentage of calories come from fat at lower intensities, higher-intensity exercise burns more total calories and more total fat calories. The best approach combines both moderate and vigorous exercise.

For effective fat burning, aim for 30-60 minutes in this zone. Longer sessions at moderate intensity are sustainable and effective. As fitness improves, you can increase duration or add intervals at higher intensities.