Daily Water Intake Calculator
How much water you should drink based on weight and activity.
Daily target
99 oz
About 12 8-oz glasses, or 2.92 L
Estimate. Coffee, tea, and water-rich foods all count toward total fluid intake. The number is a target, not a hard floor.
About
Uses your weight, activity level, and climate to estimate daily water target. The 'eight glasses a day' rule is a rough average. Bigger or more active people need more.
How to use
- Enter your weight.
- Pick activity level and climate.
- Read your target in ounces or liters.
FAQ
Does coffee or tea count?+
Yes, mostly. Caffeinated drinks are mildly diuretic but the net hydration is positive. Plain water is still ideal but everything liquid contributes.
Can you drink too much?+
Yes, though it's rare. Hyponatremia happens at extreme intakes (gallons in a few hours). For normal life, listen to thirst.