Ideal Weight Calculator (Lorenz)
Ideal weight from your height and sex
How it's calculated (Lorenz formula)
The Lorenz formula estimates ideal weight from height and sex:
- Men: ideal weight = (height − 100) − (height − 150) / 4
- Women: ideal weight = (height − 100) − (height − 150) / 2
Height is in centimetres and the result is in kilograms. The formula does not account for age or body frame.
How to interpret the result
The result is a single reference weight in kg, not a range. Compare it with your current weight: small differences fall within normal individual variation. For a fuller assessment of weight status, also use your BMI.
Why it matters
"Ideal weight" is one of the most searched calculations: it serves as a reference for weight goals, for estimating needs when a person cannot be weighed, and in some clinical contexts.
Compare the result with the Metropolitan Life tables and with your body mass index.
How to measure your height
- Measure height barefoot, with your back straight and gaze horizontal.
- Enter the value in centimetres.
- Select your sex, which sets the coefficient used by the formula.
What to do about your result
Treat the value as a rough reference, not a rigid target: a "healthy" weight also depends on muscle mass, bone structure and age.
When to see a professional: to set realistic and safe weight goals, consult a doctor or dietitian.
Limitations of the formula
- It ignores age, body frame and body composition.
- It is a historical, approximate method: different formulas give different results.
- It is not suitable for children, athletes or specific clinical situations.