Heart Rate Zone Calculator
Heart Rate Training Zones
| Zone | Name | % Range | BPM Range | Benefit |
|---|
About Heart Rate Zone Calculator
Understanding Heart Rate Zones
Heart rate training zones divide your exercise intensity into five ranges based on percentages of your maximum heart rate. Each zone targets different physiological adaptations: Zone 1 (50-60% MHR) builds base aerobic fitness, Zone 2 (60-70%) optimizes fat burning, Zone 3 (70-80%) improves cardiovascular efficiency, Zone 4 (80-90%) increases lactate threshold, and Zone 5 (90-100%) develops maximum performance capacity. Training in the right zone ensures you are getting the specific benefit you are targeting.
Calculating Maximum Heart Rate
The most common formula is MHR = 220 - age. The more accurate Tanaka formula is MHR = 208 - (0.7 x age). For even greater personalization, the Karvonen method uses heart rate reserve: Target HR = ((MHR - Resting HR) x intensity%) + Resting HR. The Karvonen method is preferred because it accounts for individual fitness levels through the resting heart rate. A lower resting heart rate indicates better cardiovascular fitness.
How to Use This Calculator
Enter your age and optionally your resting heart rate (measure first thing in the morning before getting out of bed). If you know your actual maximum heart rate from a test, you can enter that directly. The calculator displays all five training zones with their heart rate ranges, the primary benefit of each zone, and recommended workout types for each zone.
Frequently Asked Questions
Which zone burns the most fat?
Zone 2 (60-70% MHR) uses the highest percentage of fat as fuel. However, higher zones burn more total calories per minute. For weight loss, total calorie burn matters more than the fat-to-carb ratio during exercise.
How do I measure my resting heart rate?
Measure first thing in the morning before getting up. Count pulse for 60 seconds or use a fitness tracker. Take the average of 3-5 morning measurements for the most accurate reading.
Is the 220-minus-age formula accurate?
It provides a reasonable estimate but can be off by 10-15 beats in either direction. The only truly accurate way to know your max HR is through a graded exercise test. If the zones feel too easy or hard, your actual max may differ from the formula.
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