Endurance Calculator
Calculate your endurance training metrics, race predictions, training zones, and recovery needs. Perfect for runners, cyclists, triathletes, and endurance athletes of all levels.
Step 1: Athlete Metrics
Understanding Training Volume
Weekly training volume should be increased gradually (no more than 10% per week) to avoid overtraining and injury. Quality sessions are more important than sheer volume.
Step 2: Performance Goals
About Training Zones
Training in different heart rate zones develops specific physiological adaptations. Zone 2 builds aerobic base, Zone 3 improves lactate threshold, and Zone 4-5 develop VO2 max and speed.
Endurance Analysis Results
Estimated Finish Time
Race Time Predictions
| Race Distance | Predicted Time | Pace | Equivalent Performance |
|---|
Heart Rate Training Zones
Training Zone Calculation Formula
Training Zones = Maximum Heart Rate × Zone Percentage Range
Zone 1 (Recovery): 50-60% MHR | Zone 2 (Aerobic): 60-70% | Zone 3 (Tempo): 70-80% | Zone 4 (Threshold): 80-90% | Zone 5 (Maximum): 90-100%
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