BMR, TDEE and exact calorie targets for weight loss, maintenance and muscle gain at age 36.
Using the Mifflin-St Jeor equation with average US height and weight for a man aged 36, the resting metabolic rate (BMR) is approximately 1809 kcal/day. With typical daily activity included, total calorie expenditure (TDEE) ranges from 2170 kcal (sedentary) to 3120 kcal (very active).
| Goal | Daily Calories | Expected Result |
|---|---|---|
| 🔵 Aggressive weight loss | 1737 kcal | ~0.75 kg/week |
| 📉 Weight loss | 1987 kcal | ~0.5 kg/week |
| ✅ Maintenance | 2487 kcal | Weight stable |
| 💪 Lean bulk | 2787 kcal | ~0.25 kg/week |
| 🏋️ Aggressive bulk | 2987 kcal | ~0.5 kg/week |
| Activity Level | Description | Daily Calories |
|---|---|---|
| Sedentary | Desk job, minimal movement | 2170 kcal |
| Lightly active | 1–3 workouts/week | 2487 kcal |
| Moderately active | 3–5 workouts/week | 2803 kcal |
| Very active | Hard training 6–7 days/week | 3120 kcal |
Metabolic rate declines approximately 1–2% per decade after age 30, driven primarily by muscle loss (sarcopenia) rather than any inherent slowdown. At age 36, your BMR of 1809 kcal reflects your current muscle mass, height and hormonal status. The single most effective way to maintain or raise your BMR is resistance training — each kilogram of lean muscle burns roughly 13 kcal/day at rest.
| Age | Estimated BMR (man) | Change vs age 36 |
|---|---|---|
| 26 | 1859 kcal | +50 kcal |
| 31 | 1834 kcal | +25 kcal |
| 36 | 1809 kcal | — |
| 41 | 1784 kcal | -25 kcal |
| 46 | 1759 kcal | -50 kcal |
| Macro | % of Calories | Grams/day | Calories |
|---|---|---|---|
| Protein | 30% | 187 g | 748 kcal |
| Carbohydrates | 40% | 249 g | 996 kcal |
| Fat | 30% | 83 g | 747 kcal |
At age 36, protein intake is especially important. Aim for at least 71–89 g/day to maintain muscle mass, whether you're in a deficit, at maintenance, or in a surplus.
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