Health

Water Intake Calculator

Find your recommended daily water intake based on your weight, activity level and climate.

Your details

How this is calculated

This tool starts from a common baseline of 33ml of water per kilogram of body weight, then adds extra for higher activity levels and hot or humid climates, which increase fluid loss through sweat.

Frequently asked questions

Does this include water from food?

No, this is a target for fluid intake specifically. Food typically contributes an additional 20% of daily hydration on top of this.