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 40 · 55 kg

Calories for a 40-Year-Old 55 kg Man

Q: How many calories does a 40-year-old 55 kg man need?

A lightly active 40-year-old 55 kg man of average height needs approximately 1995 kcal/day to maintain weight. Sedentary needs are around 1741 kcal, and very active around 2502 kcal.

Q: How many calories to lose weight at 55 kg, age 40?

A 40-year-old 55 kg man should eat approximately 1495 kcal/day to lose about 0.5 kg per week — a 500 kcal deficit from maintenance.

Exact BMR, TDEE and calorie targets for a 40-year-old man weighing 55 kg (121 lbs).

Calorie Needs: 40 years old · 55 kg · Man

1451

BMR (at rest)

1741

Sedentary TDEE

1995
Lightly active TDEE

2248

Moderately active

1495

Weight loss target

1995

Maintenance

2295

Muscle gain target

How Many Calories Does a 40-Year-Old 55 kg Man Need?

Using the Mifflin-St Jeor equation with your exact inputs — age 40, weight 55 kg (121 lbs), average man's height (175.3 cm) — the resting metabolic rate is 1451 kcal/day. With typical daily activity, total calorie expenditure (TDEE) ranges from 1741 kcal (sedentary) to 2502 kcal (very active).

Age 40 note: Your mid-thirties are a critical window: muscle loss accelerates if untrained. Maintaining 1.6–2g protein/kg and consistent training keeps metabolism high.

Calorie Targets by Goal

Goal	Daily Calories	Expected Result
🔵 Aggressive weight loss	1245 kcal	~0.75 kg/week
📉 Weight loss	1495 kcal	~0.5 kg/week
✅ Maintenance	1995 kcal	Weight stable
💪 Lean bulk	2295 kcal	~0.25 kg/week
🏋️ Aggressive bulk	2495 kcal	~0.5 kg/week

Calorie Needs by Activity Level

Activity Level	Description	Daily Calories
Sedentary	Desk job, minimal movement	1741 kcal
Lightly active	1–3 workouts/week	1995 kcal
Moderately active	3–5 workouts/week	2248 kcal
Very active	Hard training 6–7 days/week	2502 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 1995 kcal

Macro	% of Calories	Grams/day	Calories
Protein	30%	150 g	600 kcal
Carbohydrates	40%	200 g	800 kcal
Fat	30%	66 g	594 kcal

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Frequently Asked Questions

How many calories does a 40-year-old 55 kg man need per day?A lightly active 40-year-old 55 kg man needs approximately 1995 kcal/day to maintain weight. This ranges from 1741 kcal (sedentary) to 2502 kcal (very active).

How many calories to lose weight at 55 kg, age 40?Eat 1495 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 40 affect calorie needs compared to age 35?At age 40, BMR is approximately 1451 kcal vs 1476 kcal at age 35 — 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