Water Intake Calculator
Calculate recommended daily water intake
Recommended Daily Water Intake
2.7 L
US Cups
11.2
Fluid Ounces
90 fl oz
General estimate — needs vary with health conditions, pregnancy, and medications. Consult a doctor for personalized guidance.
What is this tool?
Estimates a recommended daily water intake based on your body weight and activity level -- a more personalized starting point than the generic "eight glasses a day" advice, which doesn't account for body size or how active someone actually is.
How to use it
Enter your weight and activity level, and a suggested daily water intake is calculated.
Climate and individual sweat rate both affect actual hydration needs meaningfully -- treat this as a reasonable baseline to adjust upward on hot days or during more intense exercise, rather than a fixed number that applies regardless of conditions.
Watch: Water Intake Calculator in Action
Watch on YouTubePlays on YouTube (counts toward our @freedailypro channel).
Frequently asked questions
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