Calcolo Fabbisogno Idrico

Hydration is one of the most underestimated pillars of human health, yet most people have no idea how much water they actually need. The old advice to "drink eight glasses a day" is a blunt oversimplification that ignores body weight, activity level, climate and individual physiology. Our daily water intake calculator uses a weight-based formula adjusted for activity level, providing a far more personalised — and physiologically accurate — recommendation than any blanket rule ever could.

Water intake is intimately connected to overall body composition and weight management. Proper hydration boosts metabolic rate, reduces false hunger signals and supports kidney function. If you are on a health journey, we strongly recommend also using our BMI Calculator and Calorie Calculator to build a complete, data-driven picture of your nutritional needs.

⚕️ Please note: The figure provided is a scientifically-based general estimate. Individual hydration needs can vary significantly based on health conditions, medications and climate. If you have kidney, heart or other chronic conditions, please consult your doctor or a qualified healthcare professional for personalised advice.

Quanta acqua bisogna bere al giorno?

La formula generale è 30–35 ml di acqua per chilogrammo di peso corporeo al giorno. Una persona di 70 kg ha bisogno di circa 2,1–2,5 litri al giorno in condizioni normali. L'attività fisica aumenta il fabbisogno di ~500 ml per ora di esercizio moderato.

Cosa succede se non beviamo abbastanza?

Una disidratazione anche lieve dell'1–2% deteriora le prestazioni cognitive e la resistenza. ⚕️ Consulta il tuo medico se hai patologie renali, cardiache o altre condizioni che influenzano l'apporto idrico.