Heart Rate Calculator

Calculate max heart rate and target training zones by age.

How to Use This Calculator

Enter your Age.
Enter your Resting Heart Rate (bpm) — Optional — enables Karvonen formula zones.
Click Calculate to see instant results with a step-by-step breakdown.
Use the Share button to copy a link with your inputs pre-filled.

⚠️ Results are for informational purposes only. Always verify important calculations with a qualified professional.