Heart Rate Zones Calculator
Find your five heart rate training zones from your age and resting heart rate, using the Karvonen heart rate reserve method or a simple percent of max.
Result
Max heart rate used
185bpm
- Zone 1, very light (50–60%)
- 123–135 bpm
- Zone 2, easy endurance (60–70%)
- 135–148 bpm
- Zone 3, moderate aerobic (70–80%)
- 148–160 bpm
- Zone 4, hard threshold (80–90%)
- 160–173 bpm
- Zone 5, maximum (90–100%)
- 173–185 bpm