BMI Calculator
Calculate your Body Mass Index and its WHO classification.
Daily Water Intake Calculator
How much water to drink based on your weight and activity.
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⚠️ This calculator is for guidance only. It does not replace medical diagnosis or advice from a healthcare professional.
The daily water calculator estimates how much fluid you need each day to stay hydrated, starting from your weight (~33 ml per kg) and adding extra for exercise. It is a practical reference: real needs vary with climate, diet and each body. Thirst, urine color and your physical activity are better guides than any number. Use it as many times as you need: it is completely free, requires no sign-up and works directly in your browser.
Frequently asked questions
¿Cuánta agua hay que beber al día?
Una regla práctica es unos 33 ml por kilo de peso. Añade unos 350 ml por cada 30 minutos de ejercicio. Escucha a tu cuerpo y ajusta con el clima.
¿Es mejor beber frío o a temperatura ambiente?
La temperatura apenas importa para la hidratación. Lo importante es la cantidad y la constancia; bebe como te resulte más cómodo.
¿Puedo beber demasiada agua?
Sí, beber cantidades extremas en poco tiempo puede provocar hiponatremia. Mantente en los rangos habituales y consulta a un profesional si tienes dudas o patologías renales.
How much water should you drink per day?
A practical rule is about 33 ml per kilogram of body weight. Add about 350 ml for every 30 minutes of exercise. Listen to your body and adjust for climate.
Is it better to drink cold or room temperature water?
Temperature barely matters for hydration. What matters is quantity and consistency; drink whatever is most comfortable for you.
Can you drink too much water?
Yes, drinking extreme amounts in a short time can cause hyponatremia. Stay within usual ranges and consult a professional if you have doubts or kidney conditions.