Personal snapshot
- Chronological age--
- Basal metabolism--
- Formula--
- BMI--
- Lean mass--
- Maintenance calories--
Metabolic age compares your resting energy burn with demographic averages for your sex and age group. It helps you see whether your BMR aligns with your lifestyle and guides adjustments in training, nutrition and recovery habits to keep your metabolism responsive.
Estimated metabolic age
Fill in the form to estimate your metabolic age.
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How we estimated it
Quick ideas
Metabolic age is an approximation. Combine it with lab work, strength measurements and medical advice.
How your metabolic age is calculated
We contrast your basal metabolic rate—the calories you burn at rest—with population tables for people of the same sex across multiple age brackets. A higher-than-average BMR signals a younger metabolic profile, while lower values highlight opportunities to improve muscle mass, sleep or daily activity.
Depending on the data you share, the tool applies the Mifflin–St Jeor or Katch–McArdle formulas and cross-checks them with FAO/WHO reference datasets. Treat the outcome as guidance to complement clinical assessments, indirect calorimetry or lab work when you require precise diagnostics.
Reference values by age
| Age (years) | Male (kcal/day) | Female (kcal/day) |
|---|---|---|
| 18–20 | 1,760 – 1,780 | 1,485 – 1,500 |
| 25 | 1,735 | 1,465 |
| 30 | 1,710 | 1,445 |
| 35 | 1,685 | 1,425 |
| 40 | 1,660 | 1,405 |
| 45 | 1,640 | 1,385 |
| 50 | 1,615 | 1,365 |
| 55 | 1,590 | 1,345 |
| 60 | 1,565 | 1,325 |
| 65 | 1,540 | 1,305 |
| 70 | 1,515 | 1,285 |
| 75 | 1,490 | 1,265 |
| 80 | 1,465 | 1,245 |
Figures from FAO/WHO population estimates (European adults). Individual requirements vary with genetics, lean mass and health.
Tips to improve your metabolism
- Schedule resistance sessions two to three times weekly to preserve and grow metabolically active muscle.
- Distribute protein intake around 1.2–1.6 g/kg body weight unless your healthcare professional advises otherwise.
- Protect consistent sleep and stress-management routines to balance hormones like cortisol, leptin and ghrelin.
- Book regular health check-ups to rule out thyroid disorders, insulin resistance or other metabolic concerns.
Interpret and optimise your metabolic age
This guide explains what counts as a normal metabolic age, which variables can raise it and how to bring the number down without drastic measures.
Ideal ranges at a glance
The “ideal” metabolic age sits at or below your chronological age while labs and body composition stay healthy.
- -5 to 0 years: optimal profile; your metabolism behaves like that of someone younger.
- 0 to +5 years: normal range; maintain strength, protein intake and recovery to stay there.
- +5 years or more: keep an eye on it and review muscle mass, stress and medical screening.
These brackets are indicative: metabolic age still depends on your weight, height, BMI, body-fat percentage and medical background. Always contrast the result with a healthcare professional.
Key drivers of metabolic age
The calculator cross-references your BMR with FAO/WHO tables. The following factors tend to shift the estimate:
- Body composition: more lean mass and less visceral fat usually lower metabolic age.
- Daily movement & NEAT: walking, standing and taking the stairs increase resting expenditure.
- Sleep and hormones: fragmented rest and stress elevate cortisol, slowing metabolic efficiency.
- Metabolic health: thyroid status, glucose control and chronic inflammation alter your energy needs.
Action plan to lower your metabolic age
When your result is high, follow this 8–12 week protocol before retesting:
- Aim for ~1.4 g/kg of protein split over 3–4 meals to preserve lean tissue.
- Lift progressively and add 7,000–10,000 daily steps to boost non-exercise activity.
- Anchor sleep/wake times and reduce alcohol or ultra-processed foods that slow BMR.
- Request lab work if you suspect insulin resistance or thyroid issues.
Metabolic age FAQ
What does it mean if my metabolic age is lower than my actual age?
It suggests your metabolism is efficient and performs like that of a younger person with a similar profile.
What if my metabolic age is higher than my chronological age?
Your BMR is below the average for your group, so it can help to review training, nutrition, recovery and medical follow-up.
How can I lower my metabolic age?
Blend strength work, moderate cardio, balanced meals, quality sleep and professional guidance to improve your metabolic markers over time.
What is a normal or ideal metabolic age?
Most people fall within ±5 years of their actual age. Numbers far above that often signal low muscle mass or very sedentary routines.
Is metabolic age the same as biological age?
No. Biological age considers multiple cellular markers, whereas metabolic age compares your BMR with reference data for your sex, weight and height.
