Metabolic Age Calculator
Compare your BMR to age norms.
Enter your values
ⓘ Live results
Results
- Metabolic age
- 40 years
- Your BMR
- 1,698 kcal/day
- Chronological age
- 40 years
- Difference
- 0 years
- BMR per kg
- 21.76
Quick answer
Metabolic age compares your BMR to the average for different ages — a lower number suggests better metabolic fitness.
How to use the Metabolic Age Calculator
- 1Enter weight, height and age.
- 2Select your sex.
- 3Compare metabolic age to your actual age.
Worked example
Using the values the calculator loads with:
Inputs
- Weight78 kg
- Height178 cm
- Age40 years
- SexMale
Results
- Metabolic age40 years
- Your BMR1,698 kcal/day
- Chronological age40 years
- Difference0 years
- BMR per kg21.76
Frequently asked questions
How do I lower metabolic age?
Build muscle and reduce fat mass — lean tissue burns more at rest.
Is this scientific?
It is a popular fitness metric, not a clinical measure.
About this calculator
- Built and reviewed by James Whitfield · How we build and test calculators
- Report an error
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.