What Is the Average Weight for Women Based on Age and Height?

The average weight for women in the United States is approximately 170 pounds, while the average height is about 5 feet 3 inches. However, these figures represent population averages and do not define what is healthy for every individual.

Health is influenced by many factors beyond body weight, including nutrition, physical activity, sleep quality, genetics, and overall lifestyle habits. Understanding how weight changes throughout life can help provide context, but it is only one part of a much larger picture of health and well-being.

How Do You Know if Your Weight Is Average?

The average weight of adult women tends to vary with age.

During midlife, particularly between the ages of 40 and 65, body weight often increases due to hormonal changes, shifts in metabolism, and changes in body composition.

After midlife, average weight may gradually decrease as muscle mass declines, appetite changes, and physical activity levels often become lower.

Average Weight for Women by Age

20–29 years: 165.0 lbs (74.9 kg)

30–39 years: 174.9 lbs (79.3 kg)

40–49 years: 178.1 lbs (80.8 kg)

50–59 years: 173.5 lbs (78.7 kg)

60–69 years: 172.4 lbs (78.2 kg)

70–79 years: 164.4 lbs (74.7 kg)

80+ years: 149.7 lbs (67.9 kg)

These values represent averages only. There is no single ideal body weight that applies to everyone.

How Is Body Weight Evaluated?

One commonly used measurement is Body Mass Index (BMI), which compares weight to height.

For adults aged 20 and older, BMI categories are generally classified as:

Underweight: Below 18.5

Healthy Weight: 18.5–24.9

Overweight: 25–29.9

Obesity: 30 or higher

BMI is calculated by dividing weight in kilograms by height in meters squared.

Although BMI can be useful as a screening tool, it does not account for factors such as muscle mass, bone density, age, or body composition. As a result, it should be viewed as only one indicator of health rather than a complete assessment.

Body weight is influenced by much more than diet alone. Understanding these influences can help explain why healthy weights vary so widely from person to person.