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 45 · 55 kg

Calories for a 45-Year-Old 55 kg Man

Q: How many calories does a 45-year-old 55 kg man need?

A lightly active 45-year-old 55 kg man of average height needs approximately 1960 kcal/day to maintain weight. Sedentary needs are around 1711 kcal, and very active around 2459 kcal.

Q: How many calories to lose weight at 55 kg, age 45?

A 45-year-old 55 kg man should eat approximately 1460 kcal/day to lose about 0.5 kg per week — a 500 kcal deficit from maintenance.

Exact BMR, TDEE and calorie targets for a 45-year-old man weighing 55 kg (121 lbs).

Calorie Needs: 45 years old · 55 kg · Man

1426

BMR (at rest)

1711

Sedentary TDEE

1960
Lightly active TDEE

2210

Moderately active

1460

Weight loss target

1960

Maintenance

2260

Muscle gain target

How Many Calories Does a 45-Year-Old 55 kg Man Need?

Using the Mifflin-St Jeor equation with your exact inputs — age 45, weight 55 kg (121 lbs), average man's height (175.3 cm) — the resting metabolic rate is 1426 kcal/day. With typical daily activity, total calorie expenditure (TDEE) ranges from 1711 kcal (sedentary) to 2459 kcal (very active).

Age 45 note: After 40, hormonal changes further reduce metabolic rate. Sleep, stress management and strength training become increasingly important for body composition.

Calorie Targets by Goal

Goal	Daily Calories	Expected Result
🔵 Aggressive weight loss	1210 kcal	~0.75 kg/week
📉 Weight loss	1460 kcal	~0.5 kg/week
✅ Maintenance	1960 kcal	Weight stable
💪 Lean bulk	2260 kcal	~0.25 kg/week
🏋️ Aggressive bulk	2460 kcal	~0.5 kg/week

Calorie Needs by Activity Level

Activity Level	Description	Daily Calories
Sedentary	Desk job, minimal movement	1711 kcal
Lightly active	1–3 workouts/week	1960 kcal
Moderately active	3–5 workouts/week	2210 kcal
Very active	Hard training 6–7 days/week	2459 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 1960 kcal

Macro	% of Calories	Grams/day	Calories
Protein	30%	147 g	588 kcal
Carbohydrates	40%	196 g	784 kcal
Fat	30%	65 g	585 kcal

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Frequently Asked Questions

How many calories does a 45-year-old 55 kg man need per day?A lightly active 45-year-old 55 kg man needs approximately 1960 kcal/day to maintain weight. This ranges from 1711 kcal (sedentary) to 2459 kcal (very active).

How many calories to lose weight at 55 kg, age 45?Eat 1460 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 45 affect calorie needs compared to age 40?At age 45, BMR is approximately 1426 kcal vs 1451 kcal at age 40 — 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