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Health & FitnessInformational only

Ideal Weight Calculator

Compute ideal body weight using four classic formulas (Devine, Robinson, Miller, Hamwi) plus a healthy-BMI range.

Devine
73.0 kg
Robinson
71.0 kg
Miller
70.3 kg
Hamwi
75.0 kg
Healthy BMI
58–79 kg

What this calculates

There's no single 'ideal' weight — the concept is an estimate of what's healthy for your height and sex. This calculator shows four common clinical formulas (Devine, Robinson, Miller, Hamwi) and a healthy-BMI range so you can see how the methods compare. Real ideal weight depends on muscle mass, frame, and personal context too.

Formula & how it works

All formulas assume height ≥ 60 inches and use the inches above 60. Devine: men 50 + 2.3 × (in − 60), women 45.5 + 2.3 × (in − 60). Robinson: men 52 + 1.9 × (in − 60), women 49 + 1.7 × (in − 60). Miller: men 56.2 + 1.41 × (in − 60), women 53.1 + 1.36 × (in − 60). Hamwi: men 48 + 2.7 × (in − 60), women 45.5 + 2.2 × (in − 60). Healthy BMI range: 18.5 × h² to 24.9 × h², where h is height in metres.

Worked example

Man, 70 in tall. Devine = 50 + 2.3 × 10 = 73 kg (161 lb). Robinson = 52 + 1.9 × 10 = 71 kg (157 lb). Miller = 56.2 + 1.41 × 10 = 70.3 kg (155 lb). Hamwi = 48 + 2.7 × 10 = 75 kg (165 lb). Healthy BMI range at 1.778 m: 58.5–78.7 kg (129–174 lb). The formulas cluster in a tight band; the BMI range is broader and arguably more honest.

Frequently asked questions

Which formula is most accurate?

None is uniquely 'right' — they were developed for drug-dosage calculations in the 1960s–80s, not aesthetic targets. The healthy-BMI range is more useful as a general guide because it's a range, not a single number.

Do these work for athletes?

No. Muscular athletes routinely exceed all four formulas while having low body fat. Use body composition (DEXA, body fat %) instead — weight alone doesn't capture what matters.

What about frame size?

Some sources add ±10 % for small or large frame, measured by wrist circumference vs height. Honestly, the variation between the four formulas above is bigger than this adjustment — don't sweat it.

How do I lose/gain weight to reach my target?

About 7,700 kcal = 1 kg. A 500 kcal/day deficit = ~0.5 kg/week loss. Use the BMR/TDEE calculator to find your maintenance calories, then adjust.

Disclaimer: Informational only. Talk to a doctor or dietitian for personalized health goals.

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