Ideal Weight Calculator
Estimate ideal body weight from height and sex with the Devine, Robinson, Miller or Hamwi formula, in pounds or kilograms, and compare it with the healthy BMI weight range.
Last updated: October 2026
Ideal Weight
148 lbs
This calculator gives an estimate for general information only. It is not medical advice and does not replace a doctor, pharmacist or other qualified health professional. Always check with them before acting on the result, especially for medication doses, children, pregnancy or a medical condition, and follow the guidelines of your local health authority.
Formula below · 2 sources (CDC, pubmed.ncbi.nlm.nih.gov) · Updated Oct 2026
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About this calculator
Ideal body weight (IBW) formulas start from a base weight at 5 feet (60 inches) and add a fixed amount for each inch above that. All four give kilograms:
Devine (1974): men 50 + 2.3 × (inches − 60); women 45.5 + 2.3 × (inches − 60) Robinson (1983): men 52 + 1.9 × (inches − 60); women 49 + 1.7 × (inches − 60) Miller (1983): men 56.2 + 1.41 × (inches − 60); women 53.1 + 1.36 × (inches − 60) Hamwi (1964): men 48 + 2.7 × (inches − 60); women 45.5 + 2.2 × (inches − 60)
Metric heights are converted at 2.54 cm per inch and pounds at 2.20462 lb per kg. The frame-size setting applies a ±5% adjustment, a common convention that is not part of the original formulas; leave it on Medium if you are unsure.
What the number means
These formulas were built for drug dosing and clinical estimates, not as personal goals, and they are meant for adults about 5 feet or taller. They ignore muscle, age and body composition, and they disagree with each other by several pounds. A broader guide is the healthy-weight range for your height from body mass index (BMI 18.5 to 24.9), shown in the table below. This is an estimate, not medical advice; talk with a clinician about a target weight that suits you.
| Height | Weight (lb) | Weight (kg) |
|---|---|---|
| 5 ft 0 in | 95-128 lb | 43.0-57.8 kg |
| 5 ft 2 in | 101-136 lb | 45.9-61.8 kg |
| 5 ft 4 in | 108-145 lb | 48.9-65.8 kg |
| 5 ft 6 in | 115-154 lb | 52.0-70.0 kg |
| 5 ft 8 in | 122-164 lb | 55.2-74.3 kg |
| 5 ft 10 in | 129-174 lb | 58.5-78.7 kg |
| 6 ft 0 in | 136-184 lb | 61.9-83.3 kg |
| 6 ft 2 in | 144-194 lb | 65.4-88.0 kg |
| 6 ft 4 in | 152-205 lb | 68.9-92.8 kg |
How to use
Choose units, enter your height, sex and a formula. The default is a 68-inch (5 ft 8 in) man with the Robinson formula: 52 + 1.9 × 8 = 67.2 kg, or 148 lb. For the same man, Devine gives 50 + 2.3 × 8 = 68.4 kg (151 lb), Miller 67.5 kg (149 lb) and Hamwi 69.6 kg (153 lb). In metric, a 165 cm woman (64.96 in) gets 49 + 1.7 × 4.96 = 57.4 kg with Robinson.
Frequently asked questions
Which ideal weight formula is best?
None is clearly best. Devine is the one most often used in hospitals, mainly for drug dosing. Robinson and Miller were later refits that give lower values for tall people. Seeing all four shows how wide the uncertainty is.
Can I use this if I am under 5 feet?
The formulas were designed for heights of 5 feet and above. Below that they extrapolate, and the results are less meaningful; the BMI healthy-weight range is a better guide.
Should my ideal weight be my goal weight?
Not necessarily. Muscular people can be healthy well above these numbers. Waist size, body fat and how you feel matter too. Use the result as a rough reference and discuss a personal goal with a doctor or dietitian.
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Sources & references
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