Heart Health • Instant Result

Target Heart Rate Calculator

Calculate your specific exercise target heart rate ranges using both the Karvonen Heart Rate Reserve (HRR) and % Max HR methods.

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Understanding Your Result

The calculation generated by this tool provides an evidence-based assessment derived from established physiological and clinical equations. Use this measurement as an educational indicator alongside broader lifestyle variables, including overall dietary quality, resistance training, cardiovascular endurance, and routine medical checkups.

Mathematical Formula & Scientific Methodology

Karvonen Formula: THR = ((Max HR - Resting HR) × % Intensity) + Resting HR. This provides greater individual customization than basic % Max HR alone.

\text{THR} = [(\text{HR}_{\text{max}} - \text{HR}_{\text{rest}}) \times \text{Intensity}] + \text{HR}_{\text{rest}}

Step-by-Step Example Calculation

Max HR 185, Resting HR 60, at 70% Intensity: THR = ((185 - 60) × 0.70) + 60 = (125 × 0.70) + 60 = 87.5 + 60 = 147.5 bpm.

Clinical Limitations & Nuances

Requires an accurate baseline resting heart rate recorded under resting conditions.

Frequently Asked Questions

Why is the Karvonen formula more accurate than percent max HR?

Because it factors in your baseline resting heart rate, giving a true reflection of your usable heart rate reserve (HRR).

What target heart rate is best for general aerobic fitness?

Targeting 60% to 75% of your Heart Rate Reserve develops mitochondrial density, capillary growth, and sustainable aerobic conditioning.

Dr. Sarah Mitchell, MS, RD Medical Reviewer

Senior Health & Exercise Physiologist

Dr. Sarah Mitchell is a Clinical Exercise Physiologist and Registered Dietitian with over 12 years of clinical research experience in human metabolism, energy expenditure, and nutritional biochemistry. She peer-reviews our calculation models and health guidelines.