Desired Body Weight Calculator

Metric uses kilograms and centimetres; US uses pounds with feet and inches; UK uses stones and pounds.
Every equation here has separate coefficients for men and women.
Used when the unit system is metric.
Used when the unit system is US or UK.
The inches part of a feet-and-inches height.
Required for adjusted body weight and lean body mass; optional for ideal body weight.
Only used with UK stones-and-pounds: the pounds part, e.g. 11 st 4 lb is weight 11 and extra pounds 4.
ABW = IBW + factor x (actual - IBW). 0.4 is the usual value; some drugs use 0.25 or 0.3.
Ideal body weight
65.94 kg
Ideal Body Weight Calculator
Ideal body weight
145.4 lb
Devine
65.94 kg
Robinson
65.17 kg
Miller
65.97 kg
Hamwi
66.71 kg
Average of the four equations
65.95 kg
Healthy weight range, lower (BMI 18.5)
53.46 kg
Healthy weight range, upper (BMI 24.9)
71.96 kg
Equation used
Devine (1974)
Height used
170.0 cm
Worked out from Devine BJ, Gentamicin therapy, Drug Intelligence and Clinical Pharmacy 1974;8:650-655 - IBW(kg) = 50 (men) or 45.5 (women) + 2.3 per inch over 5 ft and 9 other sources.
The four ideal-weight equations disagree by several kilograms at the same height because they were derived for different purposes; treat any single number as one opinion, not a target.
These are population regressions used mainly for drug dosing and nutrition support, not a target to diet towards. Devine in particular was derived for gentamicin dosing, not for health. Adjusted body weight changes drug doses, so a pharmacist or prescriber must confirm any clinical use.

How this is worked out

3 steps
  1. Height = 170 cm = 66.9291 in, which is 6.9291 in over 5 ft.
  2. Devine (1974): 50 + 2.3 x 6.9291 = 65.937 kg
  3. Healthy weight band for this height (BMI 18.5 to 24.9) = 53.47 to 71.96 kg

Results are general information, not financial, tax, legal, medical or engineering advice.