Free tool

Ideal weight calculator

Ideal weight is estimated from height with the Devine and Robinson formulas and cross-checked against a body mass index between 18.5 and 24.9. A woman of 165 cm has a reference around 57 kg and a healthy range of roughly 50 to 68 kg. It is a statistical estimate, not a clinical target.

Calculate

Reference weight (Devine)

61.4 kg

Robinson formula
60.8 kg
Healthy range (BMI 18.5-24.9)
53.5 - 72.0 kg
Current body mass index
24.2
Difference from reference
8.6 kg

Formula and source

Devine: 45.5 kg (female) or 50 kg (male) plus 2.3 kg per inch over 152 cm. Robinson: 49 kg or 52 kg plus 1.7 or 1.9 kg per inch. Healthy range: BMI between 18.5 and 24.9 multiplied by height in metres squared.

Source: Devine BJ, 1974; Robinson JD et al., 1983; World Health Organization BMI classification.

Frequently asked questions

Does ideal weight apply to athletes?

No. The formulas do not separate muscle from fat, so people who lift weights often land above the reference while having excellent body composition.

Why do the two formulas disagree?

Devine and Robinson come from different samples and purposes. Using both gives a realistic range instead of a single number that looks more precise than it is.

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dietai è uno strumento organizzativo ed educativo. Non elabora piani alimentari personalizzati, non gestisce patologie, gravidanza, allattamento, allergie o intolleranze diagnosticate e non sostituisce la valutazione di un dietista, di un nutrizionista o di un medico.

Le stime di calorie e macronutrienti sono generate da un sistema di intelligenza artificiale (AI Act, Reg. UE 2024/1689): hanno un margine tipico del 10–20% e vanno intese come ordine di grandezza, non come valori da laboratorio.

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