Ideal Body Weight Calculator
Four validated clinical formulas give you a range of evidence-based ideal body weight estimates. No single formula is perfect — the consensus across formulas is more useful than any individual result.
Your Details
A rough guide: wrist circumference <16cm = small, 16–18cm = medium, >18cm = large.
Enter to see how far you are from the estimated ideal range.
Your Result
Enter your height and sex to calculate ideal body weight ranges.
What Your Result Means
For educational purposes only — not medical advice.
Important context: The term "ideal body weight" is misleading. These formulas were originally developed for pharmaceutical dosing, not as aesthetic or health targets. The Devine formula (1974), for example, was created to calculate gentamicin antibiotic doses. A more accurate framing is "reference weight for clinical calculations."
The four estimates shown represent a consensus range. Because these are population-average models based on height and sex alone, they do not account for muscle mass, bone density, or frame size. Muscular individuals, athletes, and people with naturally larger frames will often exceed these estimates while being perfectly healthy.
Frame size adjustment: Based on the Metropolitan Life Insurance tables (1983), subtract roughly 10% for a small frame or add 10% for a large frame to any formula result. This calculator applies that adjustment automatically when you select your frame size.
Ideal body weight vs. healthy weight: IBW is a clinical reference number used in medicine for drug dosing and ventilation settings — it is not a health target or a guarantee of good health. A healthy weight depends on body composition, age, fitness level, and medical history, and is often better judged by BMI range, waist circumference, and body fat percentage than by any single IBW figure.
For general health assessment, BMI-based healthy weight ranges (18.5 to 25 BMI) may be more appropriate than these clinical reference formulas. For a fuller picture, combine this with our FFMI and Body Fat % calculators.
Reference values (medium frame): The table below shows the consensus (averaged) IBW at common heights, with the full small-to-large frame range. Your exact result — and the frame-adjusted spread — depends on your inputs, so run the calculator above for a precise figure.
| Height | Male (avg) | Female (avg) | Frame range (M), approx. | Frame range (F), approx. |
|---|---|---|---|---|
| 160 cm (5'3") | 57.8 kg | 53.9 kg | 52–64 kg | 49–59 kg |
| 165 cm (5'5") | 61.9 kg | 57.7 kg | 56–68 kg | 52–63 kg |
| 170 cm (5'7") | 65.9 kg | 61.4 kg | 59–72 kg | 55–68 kg |
| 175 cm (5'9") | 70.0 kg | 65.1 kg | 63–77 kg | 59–72 kg |
| 180 cm (5'11") | 74.1 kg | 68.8 kg | 67–81 kg | 62–76 kg |
| 185 cm (6'1") | 78.2 kg | 72.5 kg | 70–86 kg | 65–80 kg |
| 190 cm (6'3") | 82.3 kg | 76.3 kg | 74–90 kg | 69–84 kg |
Think of it as a range, not a single number. All four formulas are population averages, so the most useful output is the spread they define together — not any one figure. The average (your "primary" result) sits in the middle of that spread. A muscular athlete routinely exceeds the upper end while staying healthy, because these formulas don't account for lean mass. Treat the result as a clinical reference zone, not a target you must hit.
Devine (1974): Males: 50 + 2.3 × (h/2.54); Females: 45.5 + 2.3 × (h/2.54)
Robinson (1983): Males: 52 + 1.9 × (h/2.54); Females: 49 + 1.7 × (h/2.54)
Miller (1983): Males: 56.2 + 1.41 × (h/2.54); Females: 53.1 + 1.36 × (h/2.54)
Hamwi (1964): Males: 48 + 2.7 × (h/2.54); Females: 45.5 + 2.2 × (h/2.54)
Want to learn more? Read our in-depth article: What Doctors Mean By Ideal Body Weight: 4 Formulas Compared →
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