Water Intake Calculator
Find out exactly how much water you should drink daily based on your weight and activity level.
About Daily Water Intake
Is the "8 glasses a day" rule accurate?
It's a reasonable starting point but not precise. Your actual needs depend on your weight, activity level, climate, and health. This calculator gives a more personalized estimate based on your body weight.
Does coffee and tea count toward daily intake?
Yes, in part. While caffeine has a mild diuretic effect, research shows that coffee and tea still contribute to your overall fluid intake. Water and non-caffeinated drinks are always best for pure hydration.