Health

Karvonen Heart Rate Calculator

Find target heart rate using heart rate reserve.

Calculated Output

Target heart rate (bpm) 151

Max heart rate (bpm) 190

Heart rate reserve (bpm) 130

Formula: target = (max − rest) × intensity + rest

Step-by-Step Breakdown

1. Values used:

2. Resting heart rate = 60 bpm

3. Age = 30 years

4. Intensity = 70 %

6. Target heart rate = 151bpm

7. Max heart rate = 190bpm

8. Heart rate reserve = 130bpm

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The math behind it

Max HR = 220 − age; heart rate reserve = max − resting; target = reserve × intensity% + resting.

Rest 60, age 30, 70% → ~149 bpm.

Better than %max?

Yes — it accounts for individual fitness via resting heart rate.