Hydration Calculator
Recommended daily water intake based on weight and exercise.
years
minutes/day
Worth Knowing
Popular 'eight glasses a day' advice ignores that fluid needs scale with body weight, climate, and activity, which is what this tool adjusts for. It's also worth remembering that a good share of daily water comes from food — fruit, vegetables, and cooked grains — so the target here is total fluid, not water you must drink on top of everything else. Thirst is a reliable guide for most healthy adults; pale-yellow urine is a simple, practical hydration check.
How to Use
- Enter Gender into the first field of the Hydration Calculator.
- Fill in the rest: Age, Weight, Exercise.
- Your result appears instantly as you type — there's no submit button or page reload.