Ideal weight calculator
Ideal weight calculator: four formulas and a healthy range
An ideal weight calculator estimates a target weight from your height and sex. This one shows four classic formulas, Devine, Robinson, Miller and Hamwi, next to the weight range that gives a healthy BMI. They are rough guides built for medicine dosing, not personal health goals.
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How do I calculate ideal body weight?
The classic formulas start from a base weight at 5 feet (152.4 cm) and add a fixed amount for each inch above it. For example, Devine gives 50 kg plus 2.3 kg per inch for men and 45.5 kg plus 2.3 kg per inch for women. The calculator above applies all four formulas for you.
| Formula | Men (kg) | Women (kg) |
|---|---|---|
| Devine (1974) | 50 + 2.3 per inch over 5 ft | 45.5 + 2.3 per inch over 5 ft |
| Robinson (1983) | 52 + 1.9 per inch | 49 + 1.7 per inch |
| Miller (1983) | 56.2 + 1.41 per inch | 53.1 + 1.36 per inch |
| Hamwi (1964) | 48 + 2.7 per inch | 45.5 + 2.2 per inch |
Which ideal weight formula is best?
None is best. They were created for drug dosing and give results a few kilograms apart. The Devine formula is the most widely used. For health, a BMI-based healthy range is usually a more useful guide than a single number, because it allows for different builds.
What is a healthy weight for my height?
A healthy weight is generally the range that gives a BMI of 18.5 to 24.9, or 18.5 to 22.9 using the cut-offs suggested for Asian populations. The table above shows that range for your height. Your best weight within it depends on your muscle, bone structure, health and how you feel.
See the BMI calculator.
Should I aim for my ideal weight?
An ideal weight formula is a reference point, not a goal you must reach. Weight alone does not show body composition or health, and a healthy weight can sit above or below the formula. Set goals with a doctor or dietitian, and track your trend over weeks rather than days.
To plan calories toward a goal: calorie deficit calculator.
Log what you eat in the app
A target only helps if you know what you eat. AI Calorie estimates calories and macros from a photo or a short description. It is free to start with daily limits: see pricing. This calculator is not medical advice; see medical review.
Sources
- Devine BJ. "Gentamicin therapy." Drug Intelligence and Clinical Pharmacy 1974;8:650-655.
- Robinson JD, Lupkiewicz SM, Palenik L, et al. "Determination of ideal body weight for drug dosage calculations." Am J Hosp Pharm 1983;40(6):1016-1019.
- Miller DR, Carlson JD, Lloyd BJ, Day BJ. "Determining ideal body weight." Am J Hosp Pharm 1983;40:1622-1623.
- Hamwi GJ. "Therapy: changing dietary concepts." In: Diabetes Mellitus: Diagnosis and Treatment. American Diabetes Association; 1964:73-78.
AI Calorie gives general nutrition information and AI-generated estimates. It is not medical advice. See medical review and our Terms of Use.