Health
Water Intake Calculator
How much water to drink daily, by weight & activity.
About this tool
The Water Intake Calculator estimates how much water to drink each day based on your body weight and exercise. It returns litres and an equivalent number of glasses so you can set a simple hydration goal.
Frequently asked questions
Most fluids contribute to hydration, but plain water is best. Hot weather, illness and intense exercise increase your needs.
No — it's a general estimate. Individual needs vary, so listen to your body and consult a doctor if you have specific health conditions.