What is the BMR for a 30-year-old woman?

The estimated BMR (basal metabolic rate) for a 30-year-old woman of average height and weight is 1441 kcal/day, calculated using the Mifflin-St Jeor equation.

Calorie Guide · Age 30

Calories for a 30-Year-Old Woman

Q: How many calories does a 30-year-old woman need?

A lightly active 30-year-old woman of average weight and height needs approximately 1982 kcal/day to maintain weight. Sedentary needs are around 1729 kcal, and very active around 2486 kcal.

Q: How many calories should a 30-year-old woman eat to lose weight?

A 30-year-old woman should eat approximately 1482 kcal/day to lose about 0.5 kg (1 lb) per week. This is a 500 kcal deficit from the estimated maintenance of 1982 kcal.

BMR, TDEE and exact calorie targets for weight loss, maintenance and muscle gain at age 30.

Calorie Needs at Age 30 — Average Woman

1441

BMR (at rest)

1729

Sedentary TDEE

1982
Lightly active TDEE

2234

Moderately active

1482

Weight loss target

1982

Maintenance

2282

Muscle gain target

How Many Calories Does a 30-Year-Old Woman Need?

Using the Mifflin-St Jeor equation with average US height and weight for a woman aged 30, the resting metabolic rate (BMR) is approximately 1441 kcal/day. With typical daily activity included, total calorie expenditure (TDEE) ranges from 1729 kcal (sedentary) to 2486 kcal (very active).

Age 30 note: Metabolism remains strong through your late twenties. This is the best window to build lean muscle mass — it raises your resting BMR long-term.

Calorie Targets by Goal

Goal	Daily Calories	Expected Result
🔵 Aggressive weight loss	1232 kcal	~0.75 kg/week
📉 Weight loss	1482 kcal	~0.5 kg/week
✅ Maintenance	1982 kcal	Weight stable
💪 Lean bulk	2282 kcal	~0.25 kg/week
🏋️ Aggressive bulk	2482 kcal	~0.5 kg/week

Calorie Needs by Activity Level

Activity Level	Description	Daily Calories
Sedentary	Desk job, minimal movement	1729 kcal
Lightly active	1–3 workouts/week	1982 kcal
Moderately active	3–5 workouts/week	2234 kcal
Very active	Hard training 6–7 days/week	2486 kcal

How Metabolism Changes Around Age 30

Metabolic rate declines approximately 1–2% per decade after age 30, driven primarily by muscle loss (sarcopenia) rather than any inherent slowdown. At age 30, your BMR of 1441 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 (woman)	Change vs age 30
20	1491 kcal	+50 kcal
25	1466 kcal	+25 kcal
30	1441 kcal	—
35	1416 kcal	-25 kcal
40	1391 kcal	-50 kcal

Macronutrient Split at 1982 kcal

Macro	% of Calories	Grams/day	Calories
Protein	30%	149 g	596 kcal
Carbohydrates	40%	198 g	792 kcal
Fat	30%	66 g	594 kcal

At age 30, protein intake is especially important. Aim for at least 60–74 g/day to maintain muscle mass, whether you're in a deficit, at maintenance, or in a surplus.

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Frequently Asked Questions

How many calories does a 30-year-old woman need per day?A lightly active 30-year-old woman of average size needs approximately 1982 kcal/day to maintain weight. This ranges from 1729 kcal (sedentary) to 2486 kcal (very active).

How many calories should a 30-year-old woman eat to lose weight?Aim for 1482 kcal/day — a 500 kcal deficit from the 1982 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 30 affect how many calories you burn?Yes. Every decade after 30, BMR drops ~1–2% mainly due to muscle loss. At age 30 the estimated BMR is 1441 kcal — compare to 1441 kcal at age 30. Resistance training largely offsets this decline.

Related Age Guides

Sources

WHO CDC Mifflin-St Jeor (PubMed)