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Ideal Weight Calculator

See what four classic formulas — Devine, Robinson, Miller and Hamwi — give as an ideal body weight for your height and sex, next to the much wider weight range that corresponds to a healthy BMI. Enter your height in feet and inches or centimeters.

Quick examples
ft
in
Your numbers stay in your browser. Nothing is uploaded.
Devine formula160.9 lb
Robinson formula
156.5 lb
Miller formula
155 lb
Hamwi formula
165.3 lb
Healthy BMI range from (18.5)
128.9 lb
Healthy BMI range to (24.9)
173.5 lb

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      Formula

      Devine: men 50 kg + 2.3 kg per inch over 5 ft; women 45.5 kg + 2.3 kg per inch over 5 ft
      Robinson: men 52 kg + 1.9 kg per inch over 5 ft; women 49 kg + 1.7 kg
      Miller: men 56.2 kg + 1.41 kg per inch over 5 ft; women 53.1 kg + 1.36 kg
      Hamwi: men 48 kg + 2.7 kg per inch over 5 ft; women 45.5 kg + 2.2 kg
      Healthy BMI range = 18.5 × height (m)² to 24.9 × height (m)²

      How to use it

      1. Select your sex.
      2. Enter your height.
      3. Compare the four formula results with each other and with the healthy BMI range.

      Worked examples

      A man 5 ft 10 in tall

      Devine formula
      160.9 lb
      Robinson formula
      156.5 lb
      Miller formula
      155 lb
      Hamwi formula
      165.3 lb
      Healthy BMI range from (18.5)
      128.9 lb
      Healthy BMI range to (24.9)
      173.5 lb

      A woman 5 ft 4 in tall

      Devine formula
      120.6 lb
      Robinson formula
      123 lb
      Miller formula
      129.1 lb
      Hamwi formula
      119.7 lb
      Healthy BMI range from (18.5)
      107.8 lb
      Healthy BMI range to (24.9)
      145.1 lb

      Why the formulas disagree

      None of them was derived to define a healthy weight. Hamwi published his in 1964 as a quick rule for clinicians; Devine’s 1974 formula was written to estimate drug doses, and Robinson and Miller proposed adjustments in 1983. Each is a straight line through height, so they drift apart for people who are much taller or shorter than average, and below 5 ft they are an extrapolation.

      They also ignore age, frame size and muscle. The healthy BMI range — nearly 45 lb wide at 5 ft 10 in — is a more honest picture of how much healthy weights vary.

      This is an estimate for general information, not medical advice. Talk to a doctor or other qualified clinician before making health decisions based on it.

      Questions people ask

      What is the ideal weight for a 5 ft 10 in man?

      Devine gives 73 kg (about 161 lb), Robinson 71 kg, Miller 70.3 kg and Hamwi 75 kg. The healthy BMI range at that height is about 129 to 174 lb.

      What is the ideal weight for a 5 ft 4 in woman?

      Devine gives 54.7 kg (about 121 lb), Robinson 55.8 kg, Miller 58.5 kg and Hamwi 54.3 kg. The healthy BMI range is about 108 to 145 lb.

      Which ideal weight formula is most accurate?

      None is accurate for an individual — they are height-only rules of thumb. Devine is the one most widely used in medicine, mainly for dosing calculations.

      Related calculators

      BMI CalculatorBody mass index, its WHO category and the healthy weight range for your height.Body Fat CalculatorBody fat percentage from a tape measure, by the US Navy method.Lean Body Mass CalculatorLean body mass from height and weight, by the Boer formula.Waist-to-Height Ratio CalculatorWaist ÷ height — the “keep your waist under half your height” check.Weight Loss CalculatorHow long it takes to reach a goal weight at a chosen daily calorie deficit.