Water Intake Calculator Water Intake Calculator - The Lifestyle Bird Daily Water Intake Calculator Find out how much water you should drink daily based on your weight and activity level. Your Weight (kg): Activity Level: Sedentary (little or no exercise) Lightly active (light exercise/sports 1-3 days/week) Moderately active (moderate exercise/sports 3-5 days/week) Very active (hard exercise/sports 6-7 days a week) Extra active (very hard exercise/sports & physical job) Calculate