Water Intake Calculator - Daily Hydration

How to Use

Needs vary with health conditions and medications. This is a general guideline, not medical advice.

How much water should I drink?

A common estimate is ~35 ml per kg of body weight, adjusted for activity and climate.

Do coffee and tea count?

They contribute to fluid intake, but plain water is still the best primary source.

Calculate your Body Mass Index instantly. Supports kg/lbs and cm/ft. See your category with a visual BMI scale.

Estimate body fat percentage using the US Navy method with neck, waist, and hip measurements.

Calculate daily calories and macros with Mifflin-St Jeor. Goals: maintain, lose, or gain weight.

Estimate your due date from LMP using Naegele's rule. See trimester and days remaining.