Ideal Weight Calculator
Health
Ideal weight by height & gender
Enter your height and gender to see your ideal weight from the Devine, Robinson, Miller and Hamwi formulas, alongside the healthy BMI range — in both kg and lb.
Ideal weight
Your details
Gender
Height units
Healthy range (BMI 18.5–24.9)
53 kg – 72 kg
118 lb – 159 lb
Ideal weight (formula average)
66 kg
145 lb
Height
170 cm
5 ft 7 in
Ideal weight by formula
| Formula | Ideal weight (kg) | Ideal weight (lb) |
|---|---|---|
| Devine (1974) | 66 kg | 145 lb |
| Robinson (1983) | 65 kg | 144 lb |
| Miller (1983) | 66 kg | 145 lb |
| Hamwi (1964) | 67 kg | 147 lb |
| BMI healthy range (18.5–24.9) | 53 kg – 72 kg | 118 lb – 159 lb |
The classic ideal body weight (IBW) formulas use your height and sex; the BMI range is the healthy-weight band for your height. All are population-level estimates, not personal targets — everything is computed in your browser.
What this calculator does
It estimates your ideal body weight from your height and sex using four widely used clinical formulas — Devine, Robinson, Miller and Hamwi — and also shows the weight range that corresponds to a healthy BMI (18.5–24.9). Seeing all of them together gives a realistic band rather than a single misleading number. Everything runs locally in your browser.
The ideal weight formulas explained
Each formula starts from a base weight at 5 ft (152 cm) and adds a set amount per inch of height above that, with different numbers for men and women. They were mostly created for medical use (such as drug dosing), which is why they differ:
- Devine (1974) — the most widely used. Men: 50 kg + 2.3 kg per inch over 5 ft; women: 45.5 kg + 2.3 kg per inch.
- Robinson (1983) — a revision of Devine that gives slightly lower figures for most heights.
- Miller (1983) — uses a higher base but a smaller per-inch increment, so it is flatter across heights.
- Hamwi (1964) — the oldest here and generally gives the highest ideal weight.
- BMI range — not a formula but a band: the weights that put your BMI between 18.5 and 24.9 for your height.
Ideal weight by height (healthy BMI range)
Quick reference for the healthy weight range at common heights. This band is the same for men and women; the formulas above add the sex-specific detail.
| Height | Height (cm) | Healthy range (kg) | Healthy range (lb) |
|---|---|---|---|
| 4 ft 10 in | 147 cm | 40–54 kg | 89–119 lb |
| 5 ft 0 in | 152 cm | 43–58 kg | 95–127 lb |
| 5 ft 2 in | 157 cm | 46–62 kg | 101–136 lb |
| 5 ft 4 in | 163 cm | 49–66 kg | 108–145 lb |
| 5 ft 6 in | 168 cm | 52–70 kg | 115–154 lb |
| 5 ft 8 in | 173 cm | 55–74 kg | 122–164 lb |
| 5 ft 10 in | 178 cm | 58–79 kg | 129–174 lb |
| 6 ft 0 in | 183 cm | 62–83 kg | 136–184 lb |
| 6 ft 2 in | 188 cm | 65–88 kg | 144–194 lb |
| 6 ft 4 in | 193 cm | 69–93 kg | 152–205 lb |
How to interpret your result
Treat the output as a range, not a target. If your weight sits within the band, it aligns with standard healthy-weight guidelines for your height. Falling outside it does not automatically signal a problem — none of these methods account for body composition, muscle mass, age, ethnicity, or fitness. Use the result as a starting point for a conversation with a healthcare professional.
Limitations & disclaimer
These formulas and the BMI band are informational only and are not medical advice. They can mislead for pregnant women, children, elderly adults, and highly muscular people. For personalised guidance, consult a healthcare professional.
Frequently asked questions
Which ideal weight formula is best?
There is no single "best" one — the Devine, Robinson, Miller, and Hamwi formulas were each developed for different purposes (originally mostly for medication dosing) and give slightly different results. Robinson and Miller tend to give lower figures, Hamwi higher. Looking at all four plus the BMI healthy range gives you a sensible band rather than one number.
What is the ideal weight for a man vs a woman of the same height?
For the same height, the formulas give women a lower ideal weight than men — typically a few kilograms less — because they use a lower base weight. For example, at 5 ft 7 in the Devine formula gives about 66 kg for a man and 61 kg for a woman.
Is there one true "ideal weight"?
No. Ideal weight depends on muscle mass, bone density, age, sex, and overall health. The formulas and BMI range here are general guidelines based on height and sex, not personal targets.
Can athletes use this calculator?
Athletes with high muscle mass may find the range too low, because neither BMI nor the IBW formulas distinguish muscle from fat. Supplement it with body-fat percentage, waist-to-hip ratio, or advice from a sports professional.
Does this work for children and teenagers?
No. Children and teenagers need age- and sex-specific growth charts rather than fixed formulas. Consult a paediatrician for child-specific guidance.