What is the BMI for a 55 kg woman?

At 55 kg and average height (162.6 cm), the BMI is 20.8 — Healthy weight ✅.

Calorie Guide · Age 45 · 55 kg

Calories for a 45-Year-Old 55 kg Woman

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

A lightly active 45-year-old 55 kg woman of average height needs approximately 1623 kcal/day to maintain weight. Sedentary needs are around 1416 kcal, and very active around 2036 kcal.

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

A 45-year-old 55 kg woman should eat approximately 1123 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 woman weighing 55 kg (121 lbs).

Calorie Needs: 45 years old · 55 kg · Woman

1180

BMR (at rest)

1416

Sedentary TDEE

1623
Lightly active TDEE

1829

Moderately active

1123

Weight loss target

1623

Maintenance

1923

Muscle gain target

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

Using the Mifflin-St Jeor equation with your exact inputs — age 45, weight 55 kg (121 lbs), average woman's height (162.6 cm) — the resting metabolic rate is 1180 kcal/day. With typical daily activity, total calorie expenditure (TDEE) ranges from 1416 kcal (sedentary) to 2036 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	873 kcal	~0.75 kg/week
📉 Weight loss	1123 kcal	~0.5 kg/week
✅ Maintenance	1623 kcal	Weight stable
💪 Lean bulk	1923 kcal	~0.25 kg/week
🏋️ Aggressive bulk	2123 kcal	~0.5 kg/week

Calorie Needs by Activity Level

Activity Level	Description	Daily Calories
Sedentary	Desk job, minimal movement	1416 kcal
Lightly active	1–3 workouts/week	1623 kcal
Moderately active	3–5 workouts/week	1829 kcal
Very active	Hard training 6–7 days/week	2036 kcal

BMI at 55 kg

At 55 kg and average height for a woman (162.6 cm), your BMI is 20.8 — Healthy weight ✅.

Macronutrient Split at 1623 kcal

Macro	% of Calories	Grams/day	Calories
Protein	30%	122 g	488 kcal
Carbohydrates	40%	162 g	648 kcal
Fat	30%	54 g	486 kcal

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Frequently Asked Questions

How many calories does a 45-year-old 55 kg woman need per day?A lightly active 45-year-old 55 kg woman needs approximately 1623 kcal/day to maintain weight. This ranges from 1416 kcal (sedentary) to 2036 kcal (very active).

How many calories to lose weight at 55 kg, age 45?Eat 1123 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 1180 kcal vs 1205 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