Metabolic Age Calculator
Your metabolic age compares your Basal Metabolic Rate (BMR) to the average BMR for different age groups. If your BMR is higher than average for your age, your metabolic age is younger - meaning your body burns energy more efficiently. A lower BMR suggests an older metabolic age.
Enter your details
Your Metabolic Age
ExampleExample figures, not your own. Worked for a 35 year old man of 80 kg and 175 cm. Enter your own details and press Calculate.
Metabolic Age
25years
Actual Age
35years
Your BMR
1,724kcal/day
7,212 kJ/day
10 years younger than your age
Excellent! Your metabolism is performing significantly better than average for your age. This suggests good muscle mass and overall fitness.
How It Works
First, your BMR is calculated using the Mifflin-St Jeor equation. Then it is compared against average BMR values for each age group (based on average height and weight data). Your metabolic age is the age group whose average BMR most closely matches yours. Regular exercise and more muscle mass lead to a younger metabolic age.
How to use it
- 1Select your gender
- 2Enter your chronological age
- 3Enter your weight in kilograms
- 4Enter your height in centimetres
- 5Click "Calculate" to see your metabolic age compared to your actual age
Quick Reference
| Age Group | Avg Male BMR (kcal) | Avg Female BMR (kcal) |
|---|---|---|
| 18-20 | 1,750-1,760 | 1,400-1,410 |
| 25-30 | 1,700-1,725 | 1,360-1,380 |
| 35-40 | 1,650-1,675 | 1,320-1,340 |
| 45-50 | 1,590-1,620 | 1,270-1,295 |
| 55-60 | 1,520-1,555 | 1,210-1,240 |
| 65-70 | 1,440-1,480 | 1,150-1,180 |
| 75-80 | 1,360-1,400 | 1,090-1,120 |
Average BMR values based on typical height and weight for each age group. Individual BMR varies with muscle mass and body composition.
Mifflin-St Jeor BMR Equation
- W
- = weight in kilograms
- H
- = height in centimetres
- A
- = age in years
Your BMR is compared to average BMR values for each age group. Metabolic age is the age group whose average BMR best matches yours.