Daily Hydration Calculator

Find your optimal daily water intake based on your body weight, activity level, and environment.

Enter your weight, activity level, and climate to get a personalised hydration goal in ounces and litres.

Why Hydration Matters

Even mild dehydration (1–2% of body weight) impairs cognitive performance and mood
Proper hydration supports energy levels, digestion, and sleep quality
Your needs change with activity level, heat, altitude, and health status