🎯 Fitness Updated2026-07-18
Ideal Weight Calculator.
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Quick answer
A practical ideal weight is the range for a healthy BMI (18.5–24.9) at your height. The classic Devine formula gives men 50 kg + 2.3 kg per inch over 5 ft (women 45.5 kg). Enter your height below to compare all four formulas with your BMI range.
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Ideal Weight
Healthy weight range (BMI 18.5–24.9)
53.5 – 72.0 kg
Formula average: ~65.9 kg
| Formula | Ideal weight |
|---|---|
| Devine (1974) | 65.9 kg |
| Robinson (1983) | 65.2 kg |
| Miller (1983) | 66.0 kg |
| Hamwi (1964) | 66.7 kg |
✨ Live · "Ideal weight" formulas date from the 1960s–80s and ignore frame size and muscle. The healthy BMI range is a better guide for most people.
📊 Quick reference
Healthy weight range by height.
Based on a BMI of 18.5–24.9. The same height covers a wide healthy band. There's no single "correct" number.
| Height | Healthy weight range |
|---|---|
| 150 cm | 42 – 56 kg |
| 155 cm | 44 – 60 kg |
| 160 cm | 47 – 64 kg |
| 165 cm | 50 – 68 kg |
| 170 cm | 53 – 72 kg |
| 175 cm | 57 – 76 kg |
| 180 cm | 60 – 81 kg |
| 185 cm | 63 – 85 kg |
| 190 cm | 67 – 90 kg |
❓ FAQ
Common questions.
What is "ideal body weight" and how is it calculated?
Ideal body weight (IBW) is an estimate of a healthy weight based only on your height and sex, originally created to help doctors dose medication. The best-known is the Devine formula: men 50 kg + 2.3 kg for each inch over 5 feet; women 45.5 kg + 2.3 kg per inch over 5 feet. The Robinson, Miller and Hamwi formulas tweak the constants. This calculator shows all four plus the healthy BMI range so you can compare.
Which formula should I use?
No single formula is "correct". They were derived from different populations and give slightly different numbers. For a practical target, the healthy BMI range (a BMI of 18.5–24.9 for your height) is more widely used today because it gives a range rather than a single number, allowing for natural variation. Treat the formula figures as reference points within that range.
Why do the formulas ignore my body frame and muscle?
They were built as simple height-based estimates, so they can't account for a larger frame, higher muscle mass, or age. A muscular athlete may weigh well above their "ideal" figure yet have low body fat. That's why IBW is a starting point, not a verdict. Pair it with body fat percentage and how you feel and perform.
Is ideal weight different for men and women?
Yes. Every formula uses a lower base weight for women, reflecting average differences in build and muscle mass. For the same height, a woman's ideal-weight figure comes out a few kilograms lower than a man's. This calculator switches the constants automatically when you pick your sex.
How do I find my healthy weight range from BMI?
Multiply the BMI limits by your height in metres squared. For a healthy BMI of 18.5–24.9 at 170 cm (1.7 m): low = 18.5 × 1.7² = 53.5 kg, high = 24.9 × 1.7² = 72 kg. The table on this page lists the range for common heights so you can look yours up directly.