Target Heart Rate Calculator (Karvonen)
Maximum heart rate and training zones using the Karvonen heart-rate-reserve method.
How to use the Target Heart Rate Calculator
- Enter or select: Age, Resting heart rate.
- The results (Max heart rate (Tanaka), Heart rate reserve, Training zones) are calculated instantly as you type.
- Use “Copy link” to share the calculation with the same input values.
Formula
- HR_max = 208 − 0.7 × age
- Target = HR_rest + intensity × (HR_max − HR_rest)