Ideal Weight Calculator
Find your ideal body weight by height and sex, with a healthy weight range.
US (ft, lb)Metric (cm, kg)
MaleFemale
Devine formula
160.9 lb
Robinson formula
156.5 lb
Miller formula
155.0 lb
Healthy range (BMI 18.5–24.9)
128.9 lb – 173.5 lb
The Devine, Robinson and Miller formulas estimate ideal body weight from height and sex; the healthy range comes from a BMI of 18.5–24.9. These are general references and do not account for frame size or muscle mass.
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Ideal Weight Formulas
Each formula starts from a base weight at 5 ft (60 in) and adds weight per inch above that:
| Formula | Men | Women |
|---|---|---|
| Devine (1974) | 50 kg + 2.3 kg/in over 5 ft | 45.5 kg + 2.3 kg/in over 5 ft |
| Robinson (1983) | 52 kg + 1.9 kg/in over 5 ft | 49 kg + 1.7 kg/in over 5 ft |
| Miller (1983) | 56.2 kg + 1.41 kg/in over 5 ft | 53.1 kg + 1.36 kg/in over 5 ft |
The healthy weight range uses BMI: weight = 18.5–24.9 × height(m)².
These are general references and do not account for muscle mass, frame size or body composition. For personalized targets, consult a healthcare professional.
Frequently Asked Questions
- What is ideal body weight?
- Ideal body weight (IBW) is a reference weight for a given height and sex, originally developed for medication dosing. Several formulas exist, so this tool shows the Devine, Robinson and Miller results side by side.
- Which ideal weight formula is best?
- There is no single best formula. Devine is the most widely used in medicine, Robinson and Miller tend to give slightly different values. A healthy weight is best viewed as a range rather than one exact number.
- How is the healthy weight range calculated?
- It uses a BMI of 18.5–24.9 multiplied by your height in metres squared. For example, at 5′10″ (1.78 m) the healthy range is roughly 129–173 lb (58–79 kg).
- Do these formulas account for muscle or frame size?
- No. They are based only on height and sex, so very muscular or large-framed people may weigh more while still being healthy. Consider body fat percentage and waist size as well.
- Why do the formulas only use height above 5 feet?
- Devine, Robinson and Miller all start from a base weight at 5 feet (60 inches) and add a set amount per inch above that, which is why height is the main driver of the result.
📅 Last updated: June 2026 · Formulas follow standard banking / tax conventions · Results are for reference only.