Water Intake Calculator

Free water intake calculator. Calculate daily hydration based on weight, age, activity, and climate. Shows liters, glasses, fluid ounces — 100% client-side. 100% serverless.

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Enter weight and age.
Select activity level and climate.
Click Calculate.
See your daily water intake in liters, glasses, and ounces.

Calculate your recommended daily water intake based on weight, age, activity level, and climate. Visual glass indicators and results in liters, glasses, and fluid ounces.

Features

Weight, age, activity, climate factors
Results in liters, glasses (250ml), fluid ounces
Visual glass indicators
Health hydration tips

Privacy

100% client-side.

Frequently Asked Questions

Is the calculation accurate?

The formula uses the standard 33ml per kg base, adjusted for activity and climate. Consult a healthcare professional for personalized advice.

Is my data safe?

Yes. 100% client-side. No data sent.

How is the intake calculated?

Base = weight × 33ml/kg, multiplied by activity factor (1-1.6) and climate factor (0.9-1.2).

Water Intake Calculator — Daily Hydration