Ideal weight calculation

There is no single universal ideal weight. We give you 3 estimates based on recognized formulas, plus an average. See where you feel your best.

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The 3 formulas explained

Devine Formula (1974): the simplest and most common in medical settings. It only takes height and gender into account.

Lorentz Formula (1929): older but still used. It distinguishes between men and women with a specific calculation for each.

Creff Formula: the most complete because it integrates age and body type (wrist circumference). It generally gives the most realistic result for people over 40.

Pourquoi les résultats sont différents ?

Each formula uses different variables. Devine and Lorentz ignore age and body type — they are less precise for people outside the "norm." Creff is more nuanced but requires more data.

The average of the 3 formulas gives you a realistic range. If your 3 results are close, you have a reliable estimate. If they diverge a lot, your body type is atypical, and it should be interpreted with caution.

Le poids idéal n'est qu'un repère

These formulas don't know your muscle mass, your actual health, or your well-being. An athlete will naturally be above their calculated "ideal weight."

True ideal weight is where you feel good, sleep well, have energy, and your blood tests are good. Use these numbers as a guide, not an absolute goal.

Questions fréquentes

Quelle formule est la plus fiable ?
The Creff formula is generally the most realistic because it considers age and body type. But no formula is perfect — they provide estimates, not prescriptions.
Mon poids idéal peut-il changer avec l'âge ?
Yes. With age, muscle mass naturally decreases and metabolism slows down. Formulas like Creff take this into account. An "ideal" weight at 25 isn't the same as at 55.
Je suis musclé(e), ces formules sont-elles adaptées ?
No. These formulas are designed for the general population. If you have higher-than-average muscle mass, your "normal" weight will naturally be higher than the estimates.
Faut-il viser exactement ce poids ?
No. Aim for a range of ±3 kg around the average. Weight naturally fluctuates by 1-2 kg per day (water, digestion). What matters is the trend over several weeks.

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