Find out how fast your metabolism is and how it compares to average for your age.
Calculate My Metabolism ↓Uses the Mifflin-St Jeor formula — the most accurate BMR equation for healthy adults.
After 30, adults lose 3–8% of muscle per decade without resistance training, reducing BMR.
Declining sex hormones reduce anabolic drive, making muscle maintenance harder with age.
NEAT decreases with age — less spontaneous movement reduces daily calorie burn by 200–400 kcal.
Resistance training, high protein, staying active, and quality sleep are the best counters.