BMR, TDEE and exact calorie targets for weight loss, maintenance and muscle gain at age 30.
Using the Mifflin-St Jeor equation with average US height and weight for a man aged 30, the resting metabolic rate (BMR) is approximately 1839 kcal/day. With typical daily activity included, total calorie expenditure (TDEE) ranges from 2206 kcal (sedentary) to 3172 kcal (very active).
| Goal | Daily Calories | Expected Result |
|---|---|---|
| 🔵 Aggressive weight loss | 1778 kcal | ~0.75 kg/week |
| 📉 Weight loss | 2028 kcal | ~0.5 kg/week |
| ✅ Maintenance | 2528 kcal | Weight stable |
| 💪 Lean bulk | 2828 kcal | ~0.25 kg/week |
| 🏋️ Aggressive bulk | 3028 kcal | ~0.5 kg/week |
| Activity Level | Description | Daily Calories |
|---|---|---|
| Sedentary | Desk job, minimal movement | 2206 kcal |
| Lightly active | 1–3 workouts/week | 2528 kcal |
| Moderately active | 3–5 workouts/week | 2850 kcal |
| Very active | Hard training 6–7 days/week | 3172 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 30, your BMR of 1839 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 30 |
|---|---|---|
| 20 | 1889 kcal | +50 kcal |
| 25 | 1864 kcal | +25 kcal |
| 30 | 1839 kcal | — |
| 35 | 1814 kcal | -25 kcal |
| 40 | 1789 kcal | -50 kcal |
| Macro | % of Calories | Grams/day | Calories |
|---|---|---|---|
| Protein | 30% | 190 g | 760 kcal |
| Carbohydrates | 40% | 253 g | 1012 kcal |
| Fat | 30% | 84 g | 756 kcal |
At age 30, 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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