Water Intake Calculator
Estimate your daily water intake from weight, exercise time and conditions. See litres, ounces, cups and bottle targets with every calculation running only in your browser.
Enter body weight
Use kilograms or pounds so the calculator can estimate your baseline fluid need.
Add exercise minutes
DEX adds an activity hydration top-up for daily sweat and movement.
Plan your bottles
Convert the result into litres, ounces, cups and refill goals for the day.
Water intake inputs
Hydration breakdown
Secondary metrics
What If Simulator
Daily timing guide
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Water Intake Calculator FAQ
How is daily water intake calculated?
The calculator uses 35 ml per kilogram of body weight as the baseline, then adds 12 ml for each exercise minute plus a climate or sweat adjustment.
Does this include water from food?
The result is a practical drink target. Total daily water also comes from foods and other beverages, so your exact need can vary.
Can I drink too much water?
Yes. Very high intake in a short time can be unsafe, especially during endurance exercise. Spread intake across the day and follow medical advice for kidney, heart or electrolyte conditions.
This calculator is for general wellness planning only. It is not medical advice and does not account for pregnancy, lactation, medications, kidney disease, heart disease, sodium loss or clinician-directed fluid limits.
Results are estimates generated locally in your browser from standard formulas and general population data. They are for informational purposes only and do not constitute medical advice. Always consult a qualified healthcare or fitness professional before making changes to your training, diet or health plan. VisionVix accepts no liability for decisions made based on this tool's output.
