What is the BMR for a 27-year-old woman?

The estimated BMR (basal metabolic rate) for a 27-year-old woman of average height and weight is 1456 kcal/day, calculated using the Mifflin-St Jeor equation.

Calorie Guide · Age 27

Calories for a 27-Year-Old Woman

Q: How many calories does a 27-year-old woman need?

A lightly active 27-year-old woman of average weight and height needs approximately 2002 kcal/day to maintain weight. Sedentary needs are around 1747 kcal, and very active around 2512 kcal.

Q: How many calories should a 27-year-old woman eat to lose weight?

A 27-year-old woman should eat approximately 1502 kcal/day to lose about 0.5 kg (1 lb) per week. This is a 500 kcal deficit from the estimated maintenance of 2002 kcal.

BMR, TDEE and exact calorie targets for weight loss, maintenance and muscle gain at age 27.

Calorie Needs at Age 27 — Average Woman

1456

BMR (at rest)

1747

Sedentary TDEE

2002
Lightly active TDEE

2257

Moderately active

1502

Weight loss target

2002

Maintenance

2302

Muscle gain target

How Many Calories Does a 27-Year-Old Woman Need?

Using the Mifflin-St Jeor equation with average US height and weight for a woman aged 27, the resting metabolic rate (BMR) is approximately 1456 kcal/day. With typical daily activity included, total calorie expenditure (TDEE) ranges from 1747 kcal (sedentary) to 2512 kcal (very active).

Age 27 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	1252 kcal	~0.75 kg/week
📉 Weight loss	1502 kcal	~0.5 kg/week
✅ Maintenance	2002 kcal	Weight stable
💪 Lean bulk	2302 kcal	~0.25 kg/week
🏋️ Aggressive bulk	2502 kcal	~0.5 kg/week

Calorie Needs by Activity Level

Activity Level	Description	Daily Calories
Sedentary	Desk job, minimal movement	1747 kcal
Lightly active	1–3 workouts/week	2002 kcal
Moderately active	3–5 workouts/week	2257 kcal
Very active	Hard training 6–7 days/week	2512 kcal

How Metabolism Changes Around Age 27

Metabolic rate declines approximately 1–2% per decade after age 30, driven primarily by muscle loss (sarcopenia) rather than any inherent slowdown. At age 27, your BMR of 1456 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 27
18	1501 kcal	+45 kcal
22	1481 kcal	+25 kcal
27	1456 kcal	—
32	1431 kcal	-25 kcal
37	1406 kcal	-50 kcal

Macronutrient Split at 2002 kcal

Macro	% of Calories	Grams/day	Calories
Protein	30%	150 g	600 kcal
Carbohydrates	40%	200 g	800 kcal
Fat	30%	67 g	603 kcal

At age 27, 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 27-year-old woman need per day?A lightly active 27-year-old woman of average size needs approximately 2002 kcal/day to maintain weight. This ranges from 1747 kcal (sedentary) to 2512 kcal (very active).

How many calories should a 27-year-old woman eat to lose weight?Aim for 1502 kcal/day — a 500 kcal deficit from the 2002 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 27 affect how many calories you burn?Yes. Every decade after 30, BMR drops ~1–2% mainly due to muscle loss. At age 27 the estimated BMR is 1456 kcal — compare to 1441 kcal at age 30. Resistance training largely offsets this decline.

Related Age Guides

Sources

WHO CDC Mifflin-St Jeor (PubMed)