Ideal Weight Calculator

How much should I weigh for my height?

Your ideal weight depends on height, sex, and body composition. For example, a 5'10" (178 cm) male has an ideal weight of approximately 73 kg (161 lbs) using the Devine formula, while the healthy BMI range spans 58.5–78.9 kg (129–174 lbs). Women of the same height average about 6–8 kg lower. This calculator shows results from 5 different formulas so you can see the full evidence-based range.

What is a healthy weight for a 5'5 female?

For a 5'5" (165 cm) female, the ideal weight ranges from about 52–62 kg (115–137 lbs) depending on the formula. Devine gives 57.0 kg (126 lbs), Robinson gives 57.5 kg (127 lbs), and the healthy BMI range (18.5–24.9) spans 50.4–67.8 kg. No single number is "correct" — aim for the range where you feel healthy and energetic.

What is the Devine formula for ideal body weight?

The Devine formula (1974) is the most widely used ideal body weight equation, originally developed for drug dosage calculations. For males: IBW = 50 + 2.3 × (height in inches − 60). For females: IBW = 45.5 + 2.3 × (height in inches − 60). For example, a 5'10" male: 50 + 2.3 × (70 − 60) = 73 kg. It is still the standard in pharmacology today.

Which ideal weight formula is most accurate?

No single formula is universally "most accurate" because ideal weight is influenced by muscle mass, bone density, and body composition that formulas cannot measure. The Devine formula is most commonly used in clinical settings. The WHO BMI-based range (18.5–24.9) provides the widest evidence-based healthy range. For athletes or muscular individuals, all formulas tend to underestimate ideal weight.

How is ideal body weight different from BMI?

Ideal body weight (IBW) formulas give a single target weight based on height and sex. BMI (Body Mass Index) is a ratio of weight to height squared (kg/m²) and defines categories: underweight (<18.5), normal (18.5–24.9), overweight (25–29.9), obese (30+). This calculator shows both: individual formula targets AND the healthy BMI weight range for your height.

What is a healthy weight for a 6 foot male?

For a 6'0" (183 cm) male, the ideal weight ranges from 73–80 kg (161–177 lbs) across the clinical formulas: Devine 77.6 kg, Robinson 74.8 kg, Miller 73.1 kg, Hamwi 80.4 kg. The healthy BMI range is 62.0–83.4 kg (137–184 lbs). These formulas assume average body composition — muscular individuals may healthily weigh more.

Is ideal weight the same for men and women?

No. All clinical formulas calculate different ideal weights for men and women of the same height, with men typically 4–8 kg (9–18 lbs) higher. This reflects average differences in muscle mass, bone density, and fat distribution. For example, at 170 cm (5'7"): male ideal is about 66 kg (Devine) vs 59.4 kg for a female.

Does ideal weight change with age?

The standard IBW formulas (Devine, Robinson, Miller, Hamwi) do not factor in age — they are height-and-sex–based only. However, research suggests healthy BMI may shift slightly higher with age: BMI 23–28 may be optimal for adults over 65. The WHO BMI range (18.5–24.9) is designed for adults 18–65. For children and elderly, consult a healthcare professional.