How much protein per day?

This calculator estimates a person's daily protein requirement based on recognized nutritional recommendations (European/international public health references and consensus in sports nutrition and geriatrics).

Next, the tool selects a reference range in g/kg/day (grams per kilogram of body weight per day) based on the profile.

He then applies priorities:

1. Specific medical conditions (kidney failure, dialysis, or intensive care), as these significantly alter the recommendations and require medical advice.
2. Children and teens (under 18), with benchmarks adapted to growth.
3. Seniors (65 years and older), with higher intakes to limit age-related muscle loss.
4. Goal and activity level (fat loss, muscle gain, endurance, etc.), which guide you toward typical ranges for the sport.

Once the range has been selected, the tool calculates three values: minimum, target, and maximum (in grams per day) by multiplying the weight (or a reference weight if the person indicates that they are overweight and provides this weight) by the recommendation in g/kg/day.

Finally, it displays:

• the theoretical targets in g/day and g/kg/day,
• a breakdown by meal (if a number of meals has been specified),
• a brief explanation and, if necessary, an alert.