Metabolic Age Calculator
Compare your resting metabolism to the average for each age to estimate your metabolic age.
Awaiting Data
Enter your details and tap Calculate to see your results appear here.
Your result appears here.
What Metabolic Age Means
Metabolic age compares your resting calorie burn to the average for people of different ages. A lower number than your real age points to a healthy, active metabolism.
The estimate rests on your BMR, which rises with muscle and falls with age and fat gain.
Treat it as a motivating snapshot, not a medical reading.
How to Use This Calculator
- Enter your sex, age, height, and weight.
- Tap Calculate to see your metabolic age.
- Compare it to your real age.
The Formula Used
Men: BMR = 10·weight(kg) + 6.25·height(cm) − 5·age + 5
Women: BMR = 10·weight(kg) + 6.25·height(cm) − 5·age − 161
- weight
- Body weight in kilograms.
- height
- Standing height in centimetres.
- age
- Age in years.
Your BMR is then matched against average resting metabolism across age groups to find the closest fit.
Understanding Your Results
Tips to Improve
- Strength train to raise resting metabolism.
- Protect muscle with enough protein.
- Stay active most days.
- Avoid crash diets that slow metabolism.
Frequently Asked Questions
No. It is a friendly comparison based on BMR, useful for motivation rather than diagnosis.
Build muscle, stay active, and eat well to keep your resting burn high.
Muscle loss is the main driver, which is why strength training helps so much.
Scientific References
- Mifflin, M. D., et al. (1990). A new predictive equation for resting energy expenditure. AJCN, 51(2), 241–247.
- McMurray, R. G., et al. (2014). Examining variations of resting metabolic rate of adults. MSSE, 46(7), 1352–1358.
- St-Onge, M. P., & Gallagher, D. (2010). Body composition changes with aging. Nutrition, 26(2), 152–155.