Exact calorie targets for 55 kg men — weight loss, maintenance and muscle gain.
Using the Mifflin-St Jeor equation — the most validated formula in nutrition science — a 55 kg man of average height (177 cm) aged 35 burns approximately 1486 kcal/day at rest (BMR). With typical daily activity added, total daily calorie expenditure (TDEE) ranges from 1783 to 2563 kcal depending on lifestyle.
| Goal | Daily Calories | Expected Result |
|---|---|---|
| 🔵 Aggressive weight loss | 1293 kcal | ~0.75 kg/week |
| 📉 Weight loss | 1543 kcal | ~0.5 kg/week |
| ✅ Maintenance | 2043 kcal | Weight stable |
| 💪 Lean bulk | 2343 kcal | ~0.25–0.3 kg/week |
| 🏋️ Aggressive bulk | 2543 kcal | ~0.5 kg/week |
| Activity Level | Description | Daily Calories |
|---|---|---|
| Sedentary | Desk job, no exercise | 1783 kcal |
| Lightly active | 1–3 workouts/week | 2043 kcal |
| Moderately active | 3–5 workouts/week | 2303 kcal |
| Very active | Hard training 6–7 days/week | 2563 kcal |
For a man of average height (177 cm), a weight of 55 kg gives a BMI of 17.6 — below the healthy range. BMI is one indicator, but waist circumference and body composition provide additional context.
At 2043 kcal/day (maintenance), a balanced macronutrient split:
| Macro | % of calories | Grams/day | Calories |
|---|---|---|---|
| Protein | 30% | 153 g | 613 kcal |
| Carbohydrates | 40% | 204 g | 817 kcal |
| Fat | 30% | 68 g | 613 kcal |
For weight loss (1543 kcal/day), increase protein to 35% (135 g) to preserve muscle during the deficit.
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