Free Hydration Tools
Use our calculators to understand your hydration needs. No signup required. Save your results by joining the waitlist.
Water Intake Calculator
Calculate your personalized daily water needs based on weight, activity level, and climate. Based on IOM guidelines.
Dehydration Symptom Checker
Assess your hydration status using the clinically-validated Clinical Dehydration Scale (CDS) methodology.
Athlete Hydration Calculator
Calculate sweat rate and hydration strategy for before, during, and after exercise. Based on ACSM guidelines.
Pregnancy Hydration Calculator
Calculate hydration needs during pregnancy and breastfeeding. Based on ACOG & IOM guidelines.
CKD Fluid Calculator
Calculate fluid allowance for kidney disease patients. Based on NKF KDOQI clinical guidelines.
Why Are These Tools Free?
We believe everyone should have access to accurate hydration information. These tools help you understand your needs - and if you want to track daily, Vari makes it easy.
Calculate Once
Get your personalized daily water goal in seconds.
Track Daily
Use Vari to track progress with smart reminders.
Build Habits
See your progress and maintain streaks over time.