Heart Rate Calculator
Find Your Zone 2 Fat-Burning Heart Rate
Running too fast burns carbs, not fat. Calculate your optimal Zone 2 heart rate to maximize fat burning and build endurance.
Zone 2 Calculator
Using the Karvonen Formula for accuracy
How to measure resting HR: Check your pulse for 60 seconds immediately after waking up, before getting out of bed. Do this for 3 days and take the average.
Why Zone 2 Matters
Maximizes Fat Burning
At Zone 2, your body primarily uses fat for fuel instead of carbohydrates.
Builds Endurance
Zone 2 training improves your aerobic base and mitochondrial function.
Reduces Injury Risk
Lower intensity means less stress on joints and muscles.
Sustainable Long-Term
You can train more frequently without burning out.
Enter your age and resting heart rate to see your personalized zones