Free Water Intake Calculator
Estimate how much water to drink daily.
Loading tool…
About the Water Intake Calculator
Free water intake calculator. Estimate a daily hydration target based on your body weight and activity level, in liters and cups.
How it works
- 1
Enter your weight
And your activity level.
- 2
See your target
Get a daily hydration goal.
Frequently asked questions
A common guide is about 30–35 ml per kg of body weight, adjusted up for exercise and heat.
Yes — food provides some water, so treat the number as total intake, not just drinking.