What is the BMR for a 23-year-old man?

The estimated BMR (basal metabolic rate) for a 23-year-old man of average height and weight is 1874 kcal/day, calculated using the Mifflin-St Jeor equation.

Calorie Guide · Age 23

Calories for a 23-Year-Old Man

Q: How many calories does a 23-year-old man need?

A lightly active 23-year-old man of average weight and height needs approximately 2576 kcal/day to maintain weight. Sedentary needs are around 2248 kcal, and very active around 3232 kcal.

Q: How many calories should a 23-year-old man eat to lose weight?

A 23-year-old man should eat approximately 2076 kcal/day to lose about 0.5 kg (1 lb) per week. This is a 500 kcal deficit from the estimated maintenance of 2576 kcal.

BMR, TDEE and exact calorie targets for weight loss, maintenance and muscle gain at age 23.

Calorie Needs at Age 23 — Average Man

1874

BMR (at rest)

2248

Sedentary TDEE

2576
Lightly active TDEE

2904

Moderately active

2076

Weight loss target

2576

Maintenance

2876

Muscle gain target

How Many Calories Does a 23-Year-Old Man Need?

Using the Mifflin-St Jeor equation with average US height and weight for a man aged 23, the resting metabolic rate (BMR) is approximately 1874 kcal/day. With typical daily activity included, total calorie expenditure (TDEE) ranges from 2248 kcal (sedentary) to 3232 kcal (very active).

Age 23 note: Metabolism is at its peak in your late teens and early twenties. Prioritize protein and resistance training to build muscle that pays dividends for decades.

Calorie Targets by Goal

Goal	Daily Calories	Expected Result
🔵 Aggressive weight loss	1826 kcal	~0.75 kg/week
📉 Weight loss	2076 kcal	~0.5 kg/week
✅ Maintenance	2576 kcal	Weight stable
💪 Lean bulk	2876 kcal	~0.25 kg/week
🏋️ Aggressive bulk	3076 kcal	~0.5 kg/week

Calorie Needs by Activity Level

Activity Level	Description	Daily Calories
Sedentary	Desk job, minimal movement	2248 kcal
Lightly active	1–3 workouts/week	2576 kcal
Moderately active	3–5 workouts/week	2904 kcal
Very active	Hard training 6–7 days/week	3232 kcal

How Metabolism Changes Around Age 23

Metabolic rate declines approximately 1–2% per decade after age 30, driven primarily by muscle loss (sarcopenia) rather than any inherent slowdown. At age 23, your BMR of 1874 kcal reflects your current muscle mass, height and hormonal status. The single most effective way to maintain or raise your BMR is resistance training — each kilogram of lean muscle burns roughly 13 kcal/day at rest.

Age	Estimated BMR (man)	Change vs age 23
18	1899 kcal	+25 kcal
18	1899 kcal	+25 kcal
23	1874 kcal	—
28	1849 kcal	-25 kcal
33	1824 kcal	-50 kcal

Macronutrient Split at 2576 kcal

Macro	% of Calories	Grams/day	Calories
Protein	30%	193 g	772 kcal
Carbohydrates	40%	258 g	1032 kcal
Fat	30%	86 g	774 kcal

At age 23, protein intake is especially important. Aim for at least 71–89 g/day to maintain muscle mass, whether you're in a deficit, at maintenance, or in a surplus.

Get personalized calorie targets based on your exact weight, height and activity level.

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Frequently Asked Questions

How many calories does a 23-year-old man need per day?A lightly active 23-year-old man of average size needs approximately 2576 kcal/day to maintain weight. This ranges from 2248 kcal (sedentary) to 3232 kcal (very active).

How many calories should a 23-year-old man eat to lose weight?Aim for 2076 kcal/day — a 500 kcal deficit from the 2576 kcal maintenance estimate — to lose approximately 0.5 kg per week. Never go below 1200 kcal (women) or 1500 kcal (men) for extended periods.

Does age 23 affect how many calories you burn?Yes. Every decade after 30, BMR drops ~1–2% mainly due to muscle loss. At age 23 the estimated BMR is 1874 kcal — compare to 1839 kcal at age 30. Resistance training largely offsets this decline.

Related Age Guides

Sources

WHO CDC Mifflin-St Jeor (PubMed)