The amount someone should weigh depends on multiple factors including height, age, gender, body composition, and overall health. A common starting point to estimate a healthy weight is the Body Mass Index (BMI), which relates weight to height.

• A healthy BMI range is between 18.5 and 24.9 for adults over 20 years old. For example, a woman who is 5'4" (163 cm) would ideally weigh between about 108 and 145 pounds (49 to 66 kg), while a 6-foot (183 cm) man would ideally weigh between 137 and 183 pounds (62 to 83 kg)

• BMI has limitations because it does not distinguish between muscle and fat mass, so health professionals also consider other factors such as body fat percentage, waist circumference, age, and any weight-related health conditions to determine an individual's ideal weight

• Ideal weight calculators can incorporate age, gender, and height to provide more personalized targets based on various formulas

• When aiming to lose weight, calorie intake is adjusted based on age, sex, height, weight, and activity level. Adult women generally need between 1,600 to 2,400 calories per day to maintain weight, and men between 2,000 to 3,000 calories, with variations depending on activity and age

In summary, a healthy weight is best determined by considering BMI as a baseline along with other personal health factors, rather than a fixed number. Consulting healthcare providers can help tailor weight goals to individual health needs