What is the BMI for a 55 kg man?

At 55 kg and average height (175.3 cm), the BMI is 17.9 — Underweight 🔵.

Calorie Guide · Age 50 · 55 kg

Calories for a 50-Year-Old 55 kg Man

Q: How many calories does a 50-year-old 55 kg man need?

A lightly active 50-year-old 55 kg man of average height needs approximately 1926 kcal/day to maintain weight. Sedentary needs are around 1681 kcal, and very active around 2416 kcal.

Q: How many calories to lose weight at 55 kg, age 50?

A 50-year-old 55 kg man should eat approximately 1426 kcal/day to lose about 0.5 kg per week — a 500 kcal deficit from maintenance.

Exact BMR, TDEE and calorie targets for a 50-year-old man weighing 55 kg (121 lbs).

Calorie Needs: 50 years old · 55 kg · Man

1401

BMR (at rest)

1681

Sedentary TDEE

1926
Lightly active TDEE

2171

Moderately active

1426

Weight loss target

1926

Maintenance

2226

Muscle gain target

How Many Calories Does a 50-Year-Old 55 kg Man Need?

Using the Mifflin-St Jeor equation with your exact inputs — age 50, weight 55 kg (121 lbs), average man's height (175.3 cm) — the resting metabolic rate is 1401 kcal/day. With typical daily activity, total calorie expenditure (TDEE) ranges from 1681 kcal (sedentary) to 2416 kcal (very active).

Age 50 note: In your fifties, protein needs stay high (1.2–1.6g/kg) while calorie needs drop. Prioritizing protein and resistance training prevents the muscle loss that accelerates aging.

Calorie Targets by Goal

Goal	Daily Calories	Expected Result
🔵 Aggressive weight loss	1176 kcal	~0.75 kg/week
📉 Weight loss	1426 kcal	~0.5 kg/week
✅ Maintenance	1926 kcal	Weight stable
💪 Lean bulk	2226 kcal	~0.25 kg/week
🏋️ Aggressive bulk	2426 kcal	~0.5 kg/week

Calorie Needs by Activity Level

Activity Level	Description	Daily Calories
Sedentary	Desk job, minimal movement	1681 kcal
Lightly active	1–3 workouts/week	1926 kcal
Moderately active	3–5 workouts/week	2171 kcal
Very active	Hard training 6–7 days/week	2416 kcal

BMI at 55 kg

At 55 kg and average height for a man (175.3 cm), your BMI is 17.9 — Underweight 🔵.

Macronutrient Split at 1926 kcal

Macro	% of Calories	Grams/day	Calories
Protein	30%	144 g	576 kcal
Carbohydrates	40%	193 g	772 kcal
Fat	30%	64 g	576 kcal

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Frequently Asked Questions

How many calories does a 50-year-old 55 kg man need per day?A lightly active 50-year-old 55 kg man needs approximately 1926 kcal/day to maintain weight. This ranges from 1681 kcal (sedentary) to 2416 kcal (very active).

How many calories to lose weight at 55 kg, age 50?Eat 1426 kcal/day — a 500 kcal deficit from maintenance — to lose approximately 0.5 kg per week. Recalculate every 4–6 weeks as your weight changes.

How does age 50 affect calorie needs compared to age 45?At age 50, BMR is approximately 1401 kcal vs 1426 kcal at age 45 — a difference of 25 kcal/day. Resistance training largely offsets age-related metabolic decline.

Related Calorie Guides

Sources

Mifflin-St Jeor Equation (PubMed) CDC Healthy Weight WHO