How many calories should a 40-year-old 150 lb woman eat to lose weight?

A 40-year-old 150 lb woman should eat approximately 1337 kcal/day to lose about 1 lb per week — a 500 kcal deficit from the maintenance estimate of 1837 kcal.

What is the BMI for a 150 lb woman?

At 150 lbs (68.0 kg) and average height (162.6 cm), the BMI is 25.7 — Overweight ⚠️.

Calorie Guide · Age 40 · 150 lbs

Calories for a 40-Year-Old 150 lb Woman

Q: How many calories does a 40-year-old 150 lb woman need?

A lightly active 40-year-old 150 lb woman of average height needs approximately 1837 kcal/day to maintain weight. This ranges from 1603 kcal (sedentary) to 2304 kcal (very active).

Exact BMR, TDEE and calorie targets for a 40-year-old woman weighing 150 lbs (68.0 kg).

Calorie Needs: 40 years old · 150 lbs · Woman

1336

BMR (at rest)

1603

Sedentary TDEE

1837
Lightly active TDEE

2070

Moderately active

1337

Weight loss target

1837

Maintenance

2137

Muscle gain target

How Many Calories Does a 40-Year-Old 150 lb Woman Need?

Using the Mifflin-St Jeor equation with your exact inputs — age 40, weight 150 lbs (68.0 kg), average woman's height (162.6 cm) — the resting metabolic rate is 1336 kcal/day. With typical daily activity, total calorie expenditure (TDEE) ranges from 1603 kcal (sedentary) to 2304 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	1087 kcal	~1.5 lbs/week
📉 Weight loss	1337 kcal	~1 lb/week
✅ Maintenance	1837 kcal	Weight stable
💪 Lean bulk	2137 kcal	~0.5 lbs/week
🏋️ Aggressive bulk	2337 kcal	~1 lb/week

Calorie Needs by Activity Level

Activity Level	Description	Daily Calories
Sedentary	Desk job, minimal movement	1603 kcal
Lightly active	1–3 workouts/week	1837 kcal
Moderately active	3–5 workouts/week	2070 kcal
Very active	Hard training 6–7 days/week	2304 kcal

BMI at 150 lbs

At 150 lbs (68.0 kg) and average height for a woman (162.6 cm), your BMI is 25.7 — Overweight ⚠️. BMI is a useful screening tool but doesn't measure body composition. Waist circumference and muscle mass provide additional context.

Macronutrient Split at 1837 kcal

Macro	% of Calories	Grams/day	Calories
Protein	30%	138 g	552 kcal
Carbohydrates	40%	184 g	736 kcal
Fat	30%	61 g	549 kcal

For weight loss at 1337 kcal/day, increase protein to 35% (117 g/day) to preserve muscle during the deficit. At age 40, protein becomes increasingly important for maintaining metabolic rate.

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Frequently Asked Questions

How many calories should a 40-year-old 150 lb woman eat per day?A lightly active 40-year-old 150 lb woman needs approximately 1837 kcal/day to maintain weight. This ranges from 1603 kcal (sedentary) to 2304 kcal (very active).

How many calories to lose weight at 150 lbs, age 40?Eat 1337 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 40 significantly affect calorie needs vs age 35?At age 40, BMR is approximately 1336 kcal vs 1361 kcal at age 35 — 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