Multi-Factor Physiological Age Calculator

Discover your real physiological age with our advanced calculator that combines multiple health indicators: cardiorespiratory capacity (VO₂max), resting heart rate, body composition (BMI), and physical activity level.

Your information

Basic information
Cardiorespiratory capacity
Resting heart rate
Body composition
Daily physical activity
Lifestyle factors (optional)

What is physiological age?

Physiological age (or fitness age) represents your body's functional age, as opposed to your chronological age. It is based on several health and fitness markers that reflect your true biological state.

Why is our calculator more accurate?

Unlike simplified calculators that rely on only one or two parameters, our tool combines 5 key factors for a comprehensive assessment:

  • VO₂max or running performance: The best indicator of cardiovascular health (weight 30%)
  • Resting heart rate: Reflection of cardiac efficiency (weight 25%)
  • BMI or body fat: Body composition and metabolic risks (weight 20%)
  • Daily physical activity: Number of steps and active lifestyle (weight 15%)
  • Lifestyle factors: Tobacco and alcohol (weight 10%)

How to interpret your result?

  • Physio age < Real age: Congratulations! Your physical fitness is above average for your age
  • Physio age = Real age: Your physical fitness corresponds to the average
  • Physio age > Real age: Your physical fitness could be improved

Scientific basis

Our algorithm is inspired by Norwegian research on fitness age (Norwegian University of Science and Technology) and incorporates VO₂max standards by age and sex established by the American Heart Association.

How to improve your physiological age?

  • Gradually increase your VO₂max with interval training
  • Maintain a healthy weight and optimal body composition
  • Aim for at least 7,500 steps per day
  • Reduce or quit smoking and limit alcohol
  • Practice cardiovascular activity regularly

Frequently asked questions about physiological age

What is physiological age?

Physiological age (or fitness age) represents your body's functional age, based on health and fitness markers rather than your date of birth. It can be lower than your real age (good fitness) or higher (room for improvement).

What factors influence physiological age?

Our calculator combines 5 weighted factors: VO₂max (30%), resting heart rate (25%), BMI or body fat (20%), daily physical activity in steps (15%), and lifestyle factors like smoking and alcohol (10%).

Is VO₂max the most important factor?

Yes, VO₂max accounts for 30% of the total score. It is the best indicator of cardiovascular health and longevity according to the American Heart Association. Calculate yours with our VO₂max calculator or estimate it from your MAS.

How can I improve my physiological age?

The most effective levers are: increase your VO₂max with interval training, maintain a healthy weight, aim for 7,500+ steps per day, reduce smoking and alcohol, and burn calories regularly through running.

How often should I recalculate my physiological age?

Every 3 to 6 months is ideal, or after a significant lifestyle change (starting a training program, weight loss, quitting smoking). This allows you to objectively measure the impact of your efforts.

Is this calculator reliable?

Our algorithm is inspired by research from the Norwegian University of Science and Technology and the American Heart Association norms. It combines 5 factors for a more comprehensive assessment than single-parameter calculators. For an accurate VO₂max measurement, refer to our VO₂max ↔ MAS converter.

Further reading