Calculator Cardio
Heart rate zones calculator
Training zones tell you how hard you're actually working. This uses the Karvonen method, which factors in your resting heart rate for zones tailored to your fitness — more accurate than a plain percentage of max.
| Zone | Effort | BPM |
|---|
Max heart rate is estimated (208 − 0.7 × age). If you have a heart condition or take
medication that affects heart rate, check target zones with your doctor.