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Ideal Weight Calculator

Find your ideal body weight using several well-known formulas.

Your details

Results

Average ideal weight
70 kg
Mean of Hamwi, Devine, Robinson & Miller formulas
FormulaYearIdeal weight
Hamwi196472 kg
Devine197470.5 kg
Robinson198368.9 kg
Miller198368.7 kg
Average—70 kg
Healthy BMI weight range (BMI 18.5 – 24.9)
56.7 kg – 76.3 kg
All four formulas are based on height and gender. They were originally derived from insurance mortality data and assume average body composition — your ideal weight may differ based on muscle mass, frame size and age. Treat results as a starting range, not a prescription.

What is the Ideal Weight Calculator?

An ideal weight calculator estimates your healthy target body weight using several established formulas based on height and sex. It returns multiple reference values — Devine, Robinson, Miller, and Hamwi — so you can compare ranges rather than rely on a single number.

Ideal Weight Calculator formula

Devine (most cited): 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/in; Women = 49 kg + 1.7 kg/in. Miller: Men = 56.2 kg + 1.41 kg/in; Women = 53.1 kg + 1.36 kg/in. Hamwi: Men = 48 kg + 2.7 kg/in; Women = 45.5 kg + 2.2 kg/in.

How to use the Ideal Weight calculator

  1. 1Select your biological sex.
  2. 2Enter your height in feet and inches or in centimeters.
  3. 3Click Calculate to view ideal weights from four formulas.
  4. 4Compare the values and use the range as a healthy target zone.
  5. 5Adjust expectations for muscle mass, bone structure, and age.

Example calculation

For a 5'9" (69-inch) male using the Devine formula: ideal weight = 50 + 2.3 × (69 − 60) = 50 + 20.7 = 70.7 kg (about 156 lb). The Robinson formula gives 50 + 1.9×9 = 69.1 kg, and Hamwi gives 48 + 2.7×9 = 72.3 kg.

Frequently asked questions

How do I calculate my ideal body weight?
The Devine formula is the most widely used: men = 50 kg + 2.3 kg for each inch over 5 ft; women = 45.5 kg + 2.3 kg per inch over 5 ft. This calculator shows four formulas side-by-side for comparison.
What is a healthy weight for my height?
A healthy weight usually corresponds to a BMI between 18.5 and 24.9. For example, a 5'7" adult has a healthy range of roughly 118–159 lb (53.5–72.3 kg). The ideal weight calculator narrows this to a single target value per formula.
Which ideal weight formula is best?
The Devine formula is the most cited in clinical settings, but Robinson, Miller, and Hamwi each give slightly different targets. Use the calculator's range as a guide rather than a strict goal.
Does frame size matter for ideal weight?
Yes — people with a small frame should aim near the lower end of the range, and those with a large frame near the upper end. The formulas above assume a medium frame; consult a healthcare provider for individualized guidance.

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