FREE ONLINE TOOLFree Water Intake
Free Water Intake
Calculator
Free advanced Water Intake Calculator using National Academies total-water references, beverage/food-water separation, optional measured sweat-rate planning, fluid-balance checks, remaining-intake tracking, bottle equivalents and transparent assumptions.
FreeUse this tool without paying.No sign upStart with the tool right away.Clear stepsRead the tool’s own guidance.
About Free Water Intake Calculator
Start with National Academies total-water reference values, separate food water from beverages, then optionally add an individualized exercise allowance from a measured sweat rate—not a generic “drink X mL every 30 minutes” guess.
Workspace options
- Reference group
- Estimated water from food %
- Custom total water L/day
- Body weight
- Weight unit
- Waking hours
Available actions
- No session
- Known sweat rate
- Calculate sweat rate
- Copy hydration report
- Export CSV
- Reset