Tool4SaaS

Water Intake Calculator

Estimate daily water intake from weight, activity and climate. See liters and glasses per da. 100% private and offline.

Daily water intake

—

Enter weight to calculate

Base = weightKg × 35 ml
Glasses per day (250 ml)

—

1 glass = 250 ml

More Health & Fitness

Calorie CalculatorIdeal Weight CalculatorMacro CalculatorPregnancy CalculatorOvulation CalculatorSleep Calculator

About the author

Written and maintained by the Tool4SaaS team. Every tool runs locally in your browser and is tested in-house for accuracy. Last updated: .

Frequently asked questions

Base = weightKg×35ml, +500ml if active or hot climate. Glasses = ml÷250.

No, for informational purposes only. Consult a healthcare professional for personal guidance. Hydration needs vary; consult a professional.

Yes, water intake math runs locally in your browser and stays private.

How to use Water Intake Calculator

  1. Enter weight: Enter weight in kg or lb.
  2. Set activity: Choose activity and climate.
  3. View: See liters and glasses per day.