Formula used
Base target uses 35 ml per kg, then adds activity, heat, and a small caffeine buffer.
Health tool
Water Intake Calculator
Estimate your daily water target from body weight, activity, heat, caffeine, and bottle size. Get the answer in liters, cups, bottles, and a simple drinking schedule.
Weight-basedHot weatherDaily schedule
Better timing
Drinking earlier is more useful than catching up late at night and interrupting sleep.
Use judgment
Very high water intake can be unsafe. Don’t force water beyond thirst and common sense.
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Help & answers
Frequently Asked Questions
Important disclaimer: Alexonic Tools is completely free to use. There is no charge, and we do not save tool inputs or generated results. We value customer privacy and keep building and fixing each day. Always verify important financial, payroll, legal, tax, business, or production-code results before relying on them. If you see an issue, need a tool, or require an update, send feedback to the developer.