Man, 5 ft 10 in (177.8 cm)
10 in over 5 ft. Devine: 50 + 2.3 × 10 = 73 kg. Healthy BMI band: 58.5–78.7 kg.
Ideal weight calculator (Devine, Robinson, Miller, Hamwi)
Sex
Units
cm
Ideal weight (Devine)
65.9 kg
Healthy BMI range for this height: 53.5 kg to 72 kg.
- Robinson
- 65.2 kg
- Miller
- 66 kg
- Hamwi
- 66.7 kg
- BMI 18.5–24.9
- 53.5 kg–72 kg
How we got this
- 170 cm = 66.9 in, 6.9 in over 5 ft
- Devine: 50 + 2.3 × 6.9 = 65.9 kg
A range, not a number
The four formulas usually land within 5 kg of each other. Read them alongside the healthy BMI band and, if you train, your body fat.
Sources
What this calculator does not account for
- Frame size, muscle and age.
- Heights under 5 ft, where the formulas were never tested.
- Children and pregnancy. It is a dosing formula, not a health target.
How this is calculated
Formula: Devine (1974)
IBW =50 kg (men) or 45.5 kg (women) + 2.3 kg × inches over 5 ftWhat the symbols mean
- inches over 5 ftHeight in inches minus 60. Shorter heights use 0.
Good to know
- Robinson, Miller and Hamwi change the base and the kilograms per inch.
- The BMI band is 18.5 to 24.9 times height in metres squared.
Read the full methodologyFound an error? Contact us
Worked examples
Each example is worked out by the same code as the calculator above.
Woman, 5 ft 4 in (162.56 cm)
4 in over 5 ft. Devine: 45.5 + 2.3 × 4 = 54.7 kg; Robinson gives 55.8 kg.
Embed this calculator
The frame shows the tool only.
<iframe src="/embed/ideal-weight" title="Ideal weight calculator" width="100%" height="720" style="border:0;max-width:42rem" loading="lazy"></iframe>Questions
Which formula is right?
None is exact. Devine is the one hospitals use for dosing. The spread across all four shows how rough the idea of one ideal weight is.
What if I am under 5 feet?
The formulas were not built for it; the page uses the 5 ft value. Rely on the BMI range instead.
Does it work for children?
No. Children need growth charts for their age and sex.