How this calculator works
This tool estimates your total daily water needs using your body weight
and then adjusts for activity level, climate, and extra needs (such as
pregnancy or breastfeeding). It assumes that around 20% of the water you
use in a day comes from food and 80% from drinks, which is typical in many
diets.
The result is a reasonable starting point for most healthy adults, but not
a medical recommendation. Always follow your doctor’s advice if you have
heart, kidney, or other medical conditions that affect fluid balance.