Men's higher proportion of lean muscle mass and testosterone levels typically result in a higher basal metabolic rate. Your calorie targets update instantly as you type.
Testosterone is the primary hormonal driver behind the metabolic differences between men and women. Men produce roughly 10–20 times more testosterone than women, and this hormone directly stimulates muscle protein synthesis, helping build and maintain lean muscle mass. Since muscle is the single largest contributor to basal metabolic rate, men's higher testosterone levels translate directly into more calories burned at rest.
The numbers illustrate this clearly: each kilogram of skeletal muscle burns approximately 13 calories per day at rest, compared to just 4.5 calories per day for each kilogram of fat tissue. Men typically carry significantly more lean mass and less essential body fat (2–5% essential fat vs. 10–13% for women), meaning a larger proportion of a man's total body weight is metabolically active tissue.
This metabolic advantage also explains why men often lose weight faster initially. With a higher TDEE, men can create a larger calorie deficit while still staying above the recommended safety floor of 1,500 calories per day. Additionally, men's larger glycogen stores in muscle tissue mean more water is released during the first weeks of dieting, producing a more dramatic initial drop on the scale.
However, this advantage diminishes with age. After 30, men lose approximately 3–5% of their muscle mass per decade through a process called sarcopenia, reducing BMR by roughly 2–3% per decade. Strength training becomes increasingly important to maintain metabolic rate as you age.
A 30-year-old man, 180 cm, 80 kg, moderately active:
BMR = (10 × 80) + (6.25 × 180) − (5 × 30) + 5 = 800 + 1,125 − 150 + 5 = 1,780 kcal/day
TDEE = 1,780 × 1.55 = 2,759 kcal/day
Fat loss target = 2,759 − 500 = 2,259 kcal/day