Water Intake Calculator

The calculator suggests daily water intake based on your weight, activity, and climate. General guidance is often around 2–3 litres for adults, but needs vary.

The result usually refers to fluids you drink. Water from fruits, soups, and other foods also counts toward hydration but is not always included in the number shown.

Increase intake on active days or in hot weather. The calculator may have an activity or climate option; use it to get a higher recommendation.

For most people, drinking to thirst is safe. Very high intake in a short time can be harmful. If you have a medical condition, follow your doctor’s advice on fluid intake.