Training Zones Calculator
Calculate your personalized training zones for heart rate, power, or pace
Zone Configuration
Your Training Zones
Based on Karvonen Method
Heart Rate Zones
Z1Recovery
125 - 138BPM
Z2Aerobic
138 - 151BPM
Z3Tempo
151 - 164BPM
Z4Threshold
164 - 177BPM
Z5VO2max
177 - 190BPM
Zone Descriptions
Z1: Active recovery, very easy effort
Z2: Aerobic base building, conversational pace
Z3: Tempo work, "comfortably hard"
Z4: Threshold training, sustainable hard effort
Z5: VO2max intervals, very hard
💡
Help us improve!
How would you rate the Training Zones Calculator?
Editorial Note
MyCalcBuddy Editorial Team
This page is maintained as an educational calculator reference.
📚
Formula Source: Standard Mathematical References
by Various
🔄Last reviewed: May 2026
✓Formula checks are based on standard references and internal QA review.