Water Intake Calculator

Estimate daily water intake based on your weight and activity.

Weight-basedActivity adjustedLiters/dayEasy to follow

Choose kg or lbs.

Optional — enter 0 if none.

How water intake is calculated

A common guideline is around 33 ml per kg of body weight, plus extra water for physical activity.

Base: 0.033L per kg
Activity: +0.35L / 30 min
Drink steadily through the day
Increase during heat/exercise

Numoro calculators are designed to be simple, fast, and easy to use.