About Heart Rate Calculator
Calculate maximum heart rate and customized target cardio training zones using the Karvonen formula.. Designed for accurate, instantaneous calculations with zero wait time.
Formula
Max HR = 220 - Age | Target HR = [(Max HR - Resting HR) × %] + Resting HR
Example Calculation
For a 30-year-old with resting HR of 65 bpm, the 70% aerobic zone is ~152 bpm.
How to Use
- Enter your values into the form fields above.
- The calculation updates immediately in real time.
- Inspect the main summary and secondary breakdowns below.