Water Intake Calculator

Estimate a practical daily water intake target based on body weight, activity, climate, and caffeine intake.

Used as the base for your daily water estimate.
Sweat and movement can raise water needs.
Hot weather usually increases fluid needs.
Extra movement can increase fluid demand.
High caffeine intake may slightly increase hydration needs.
Fruit, vegetables, soups, and similar foods contribute some fluids.
How we calculate

We start with a simple bodyweight-based estimate, then adjust for exercise, climate, caffeine, and water-rich foods.