How many calories should a 40-year-old 170 lb woman eat to lose weight?

A 40-year-old 170 lb woman should eat approximately 1461 kcal/day to lose about 1 lb per week — a 500 kcal deficit from the maintenance estimate of 1961 kcal.

What is the BMI for a 170 lb woman?

At 170 lbs (77.1 kg) and average height (162.6 cm), the BMI is 29.2 — Overweight ⚠️.

Calorie Guide · Age 40 · 170 lbs

Calories for a 40-Year-Old 170 lb Woman

Q: How many calories does a 40-year-old 170 lb woman need?

A lightly active 40-year-old 170 lb woman of average height needs approximately 1961 kcal/day to maintain weight. This ranges from 1712 kcal (sedentary) to 2460 kcal (very active).

Exact BMR, TDEE and calorie targets for a 40-year-old woman weighing 170 lbs (77.1 kg).

Calorie Needs: 40 years old · 170 lbs · Woman

1426

BMR (at rest)

1712

Sedentary TDEE

1961
Lightly active TDEE

2211

Moderately active

1461

Weight loss target

1961

Maintenance

2261

Muscle gain target

How Many Calories Does a 40-Year-Old 170 lb Woman Need?

Using the Mifflin-St Jeor equation with your exact inputs — age 40, weight 170 lbs (77.1 kg), average woman's height (162.6 cm) — the resting metabolic rate is 1426 kcal/day. With typical daily activity, total calorie expenditure (TDEE) ranges from 1712 kcal (sedentary) to 2460 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	1211 kcal	~1.5 lbs/week
📉 Weight loss	1461 kcal	~1 lb/week
✅ Maintenance	1961 kcal	Weight stable
💪 Lean bulk	2261 kcal	~0.5 lbs/week
🏋️ Aggressive bulk	2461 kcal	~1 lb/week

Calorie Needs by Activity Level

Activity Level	Description	Daily Calories
Sedentary	Desk job, minimal movement	1712 kcal
Lightly active	1–3 workouts/week	1961 kcal
Moderately active	3–5 workouts/week	2211 kcal
Very active	Hard training 6–7 days/week	2460 kcal

BMI at 170 lbs

At 170 lbs (77.1 kg) and average height for a woman (162.6 cm), your BMI is 29.2 — Overweight ⚠️. BMI is a useful screening tool but doesn't measure body composition. Waist circumference and muscle mass provide additional context.

Macronutrient Split at 1961 kcal

Macro	% of Calories	Grams/day	Calories
Protein	30%	147 g	588 kcal
Carbohydrates	40%	196 g	784 kcal
Fat	30%	65 g	585 kcal

For weight loss at 1461 kcal/day, increase protein to 35% (128 g/day) to preserve muscle during the deficit. At age 40, protein becomes increasingly important for maintaining metabolic rate.

Get a fully personalized TDEE based on your exact height and activity level.

Calculate My TDEE →

Frequently Asked Questions

How many calories should a 40-year-old 170 lb woman eat per day?A lightly active 40-year-old 170 lb woman needs approximately 1961 kcal/day to maintain weight. This ranges from 1712 kcal (sedentary) to 2460 kcal (very active).

How many calories to lose weight at 170 lbs, age 40?Eat 1461 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 1426 kcal vs 1451 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