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

A 45-year-old 140 lb man should eat approximately 1577 kcal/day to lose about 1 lb per week — a 500 kcal deficit from the maintenance estimate of 2077 kcal.

What is the BMI for a 140 lb man?

At 140 lbs (63.5 kg) and average height (175.3 cm), the BMI is 20.7 — Healthy weight ✅.

Calorie Guide · Age 45 · 140 lbs

Calories for a 45-Year-Old 140 lb Man

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

A lightly active 45-year-old 140 lb man of average height needs approximately 2077 kcal/day to maintain weight. This ranges from 1813 kcal (sedentary) to 2606 kcal (very active).

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

Calorie Needs: 45 years old · 140 lbs · Man

1511

BMR (at rest)

1813

Sedentary TDEE

2077
Lightly active TDEE

2342

Moderately active

1577

Weight loss target

2077

Maintenance

2377

Muscle gain target

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

Using the Mifflin-St Jeor equation with your exact inputs — age 45, weight 140 lbs (63.5 kg), average man's height (175.3 cm) — the resting metabolic rate is 1511 kcal/day. With typical daily activity, total calorie expenditure (TDEE) ranges from 1813 kcal (sedentary) to 2606 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	1327 kcal	~1.5 lbs/week
📉 Weight loss	1577 kcal	~1 lb/week
✅ Maintenance	2077 kcal	Weight stable
💪 Lean bulk	2377 kcal	~0.5 lbs/week
🏋️ Aggressive bulk	2577 kcal	~1 lb/week

Calorie Needs by Activity Level

Activity Level	Description	Daily Calories
Sedentary	Desk job, minimal movement	1813 kcal
Lightly active	1–3 workouts/week	2077 kcal
Moderately active	3–5 workouts/week	2342 kcal
Very active	Hard training 6–7 days/week	2606 kcal

BMI at 140 lbs

At 140 lbs (63.5 kg) and average height for a man (175.3 cm), your BMI is 20.7 — 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 2077 kcal

Macro	% of Calories	Grams/day	Calories
Protein	30%	156 g	624 kcal
Carbohydrates	40%	208 g	832 kcal
Fat	30%	69 g	621 kcal

For weight loss at 1577 kcal/day, increase protein to 35% (138 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 man eat per day?A lightly active 45-year-old 140 lb man needs approximately 2077 kcal/day to maintain weight. This ranges from 1813 kcal (sedentary) to 2606 kcal (very active).

How many calories to lose weight at 140 lbs, age 45?Eat 1577 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 1511 kcal vs 1536 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