How many calories should a 45-year-old 140 lb woman eat to lose weight?

A 45-year-old 140 lb woman should eat approximately 1240 kcal/day to lose about 1 lb per week — a 500 kcal deficit from the maintenance estimate of 1740 kcal.

What is the BMI for a 140 lb woman?

At 140 lbs (63.5 kg) and average height (162.6 cm), the BMI is 24.0 — Healthy weight ✅.

Calorie Guide · Age 45 · 140 lbs

Calories for a 45-Year-Old 140 lb Woman

Q: How many calories does a 45-year-old 140 lb woman need?

A lightly active 45-year-old 140 lb woman of average height needs approximately 1740 kcal/day to maintain weight. This ranges from 1518 kcal (sedentary) to 2183 kcal (very active).

Exact BMR, TDEE and calorie targets for a 45-year-old woman weighing 140 lbs (63.5 kg).

Calorie Needs: 45 years old · 140 lbs · Woman

1265

BMR (at rest)

1518

Sedentary TDEE

1740
Lightly active TDEE

1961

Moderately active

1240

Weight loss target

1740

Maintenance

2040

Muscle gain target

How Many Calories Does a 45-Year-Old 140 lb Woman Need?

Using the Mifflin-St Jeor equation with your exact inputs — age 45, weight 140 lbs (63.5 kg), average woman's height (162.6 cm) — the resting metabolic rate is 1265 kcal/day. With typical daily activity, total calorie expenditure (TDEE) ranges from 1518 kcal (sedentary) to 2183 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	990 kcal	~1.5 lbs/week
📉 Weight loss	1240 kcal	~1 lb/week
✅ Maintenance	1740 kcal	Weight stable
💪 Lean bulk	2040 kcal	~0.5 lbs/week
🏋️ Aggressive bulk	2240 kcal	~1 lb/week

Calorie Needs by Activity Level

Activity Level	Description	Daily Calories
Sedentary	Desk job, minimal movement	1518 kcal
Lightly active	1–3 workouts/week	1740 kcal
Moderately active	3–5 workouts/week	1961 kcal
Very active	Hard training 6–7 days/week	2183 kcal

BMI at 140 lbs

At 140 lbs (63.5 kg) and average height for a woman (162.6 cm), your BMI is 24.0 — Healthy weight ✅. BMI is a useful screening tool but doesn't measure body composition. Waist circumference and muscle mass provide additional context.

Macronutrient Split at 1740 kcal

Macro	% of Calories	Grams/day	Calories
Protein	30%	130 g	520 kcal
Carbohydrates	40%	174 g	696 kcal
Fat	30%	58 g	522 kcal

For weight loss at 1240 kcal/day, increase protein to 35% (108 g/day) to preserve muscle during the deficit. At age 45, protein becomes increasingly important for maintaining metabolic rate.

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Frequently Asked Questions

How many calories should a 45-year-old 140 lb woman eat per day?A lightly active 45-year-old 140 lb woman needs approximately 1740 kcal/day to maintain weight. This ranges from 1518 kcal (sedentary) to 2183 kcal (very active).

How many calories to lose weight at 140 lbs, age 45?Eat 1240 kcal/day for a 500 kcal deficit — approximately 1 lb of fat loss per week. Recalculate your targets every 4–6 weeks as your weight changes.

Does age 45 significantly affect calorie needs vs age 40?At age 45, BMR is approximately 1265 kcal vs 1290 kcal at age 40 — a difference of 25 kcal/day. This is mainly driven by gradual muscle loss over time, which is largely preventable with resistance training.

Related Calorie Guides

Sources

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