Mifflin-St Jeor (Recommended)
Male: (10 × kg) + (6.25 × cm) − (5 × age) + 5
Female: (10 × kg) + (6.25 × cm) − (5 × age) − 161
Harris-Benedict
Male: 88.36 + (13.4 × kg) + (4.8 × cm) − (5.7 × age)
Female: 447.6 + (9.2 × kg) + (3.1 × cm) − (4.3 × age)
• Build muscle through strength training
• Stay physically active daily
• Get adequate quality sleep (7-9 hours)
• Eat protein-rich foods
• Stay hydrated
• Manage stress levels
Metabolic age is a concept that compares your Basal Metabolic Rate (BMR) to the average BMR of people at different chronological ages. Your BMR represents the number of calories your body burns at rest to maintain vital functions like breathing, circulation, and cell production. By comparing your BMR to population averages, we can estimate whether your metabolism functions like someone younger, older, or the same age as you.
A metabolic age lower than your actual age suggests a more efficient metabolism, often associated with higher muscle mass and better overall fitness. Conversely, a higher metabolic age may indicate a slower metabolism, which can be influenced by factors such as body composition, activity level, and lifestyle habits.
Basal Metabolic Rate is the amount of energy your body expends while at complete rest. This includes energy used for breathing, blood circulation, controlling body temperature, cell growth, brain and nerve function, and contraction of muscles. BMR typically accounts for about 60-75% of your total daily energy expenditure.
Several factors influence BMR, including age, gender, body composition (muscle vs. fat), genetics, hormones, and overall health. Generally, BMR decreases with age as muscle mass tends to decline. Men typically have higher BMRs than women due to greater muscle mass. Understanding your BMR can help you make informed decisions about nutrition and exercise.
Factors That Lower Metabolic Age
- • Higher muscle mass
- • Regular physical activity
- • Strength training
- • Adequate protein intake
- • Quality sleep
- • Proper hydration
Factors That Raise Metabolic Age
- • Sedentary lifestyle
- • Loss of muscle mass
- • Poor sleep quality
- • Chronic stress
- • Restrictive dieting
- • Hormonal imbalances
Metabolic age is an estimate based on population averages and should not be considered a medical diagnosis. Individual metabolism varies significantly based on genetics, health conditions, medications, and other factors not captured in these calculations. For personalized health advice, please consult with a healthcare professional or registered dietitian. This calculator is intended for educational purposes only.