Ideal weight calculator

There is no single "most accurate" formula, as each method considers different aspects. The Broca formula (height - 100) is the simplest, while Robinson, Miller, and Devine represent more modern approaches based on statistical data. The best approach is to compare all four formulas to determine a realistic weight range. Deviations between formulas typically range from 3-8 kg.

Each formula was developed for different purposes: The Broca formula dates from the 19th century and uses simple subtraction. Robinson (1983) and Miller (1983) are based on modern body measurement studies and consider average body composition. The Devine formula (1974) was originally developed for medical drug dosage calculations. The differences reflect various populations, measurement methods, and scientific findings.

With increasing age, a slightly higher weight can be health-beneficial. From age 40 onwards, an addition of 1-3 kg is often recommended as metabolism and body composition change. Muscle mass decreases (sarcopenia), while body fat percentage increases. A moderate weight cushion can serve as a reserve during illness in older age and reduce fall risk through better stability.

No, ideal weight is a guideline, not an absolute target. More important are individual factors such as well-being, fitness, blood pressure, and blood values. An athlete with high muscle mass may have "overweight" according to the formula but be perfectly healthy. Focus on a healthy lifestyle with balanced nutrition and regular exercise rather than a specific number on the scale.

Ideal weight is given in kilograms and is based on gender, age, and height. BMI (Body Mass Index) is a ratio value: weight divided by height squared (kg/m²). Ideal weight provides a concrete target value, while BMI defines categories such as normal weight (18.5-24.9), overweight (25-29.9), or obesity (≥30). Both methods have weaknesses for muscular individuals.

No, the classic ideal weight formulas do not consider muscle mass or body frame (bone structure). A broad-shouldered, muscular person with heavy bone structure can weigh 5-10 kg more than the calculated ideal weight without being overweight. Conversely, a person with narrow stature and low muscle mass can achieve a healthy state at lower weight. Supplementary measurements such as body fat percentage or waist circumference are useful.

Men have on average 10-15% more muscle mass than women at the same height. Muscles are denser and heavier than fat tissue. Additionally, men have different body composition: heavier bones, broader shoulders, and generally more lean mass (organs, muscles, bones). These biological differences lead to higher ideal weights for men, which is considered in all four formulas.

Yes, the ideal weight formulas also provide a target value for healthy weight when underweight. If your current weight is significantly below the calculated ideal weight, you should consult a doctor or nutritionist to clarify causes and develop a healthy building plan. Rapid weight gains are not advisable – a moderate gain of 0.5-1 kg per month is healthier.

An annual recalculation is sufficient, as the basic parameters (age, height) change only slowly. Recalculation becomes relevant with significant life changes: major weight changes (±10 kg), muscle building through intensive training, hormonal changes (menopause, pregnancy), or from age 40 onwards, when age adjustments become more relevant.

No, the calculator is an informative tool but does not replace professional medical advice. For health problems, eating disorders, extreme over- or underweight, chronic diseases, or uncertainties regarding your weight, you should definitely consult a doctor, nutritional physician, or certified nutritionist. They can comprehensively assess individual factors, blood values, and your health condition.