Daily Water Intake Calculator

How to use

1. Select your gender.
2. Enter your body weight in kilograms.
3. Enter daily exercise or physical activity duration in minutes.
4. Choose your local climate (temperate, warm, or hot).
5. View your recommended daily water volume in milliliters, liters, and 250ml glasses.

How much water do you really need?

Individual fluid needs vary significantly based on body mass, sweat rate, environmental temperature, and diet. The standard baseline guideline is approximately 30 to 35 ml per kilogram of body weight.

During physical exercise, you lose additional fluid through perspiration and respiration. Adding 350–400 ml of water for every 30 minutes of moderate-to-vigorous exercise helps maintain peak performance.

What counts toward your daily fluid intake?

All fluids count toward hydration, including tea, coffee, milk, broth, and water-rich fruits and vegetables like cucumbers, watermelon, and oranges. About 20% of daily water typically comes from food.

Plain water remains the best choice for hydration because it is readily absorbed and calorie-free without added sodium or sugars.

Signs of proper hydration

Thirst is your body's primary signal, but urine color is also a reliable indicator: pale straw-colored urine indicates adequate hydration, whereas dark amber suggests you need to drink more.

Individuals with kidney conditions, congestive heart failure, or specific medical fluid restrictions should always consult their physician for tailored hydration advice.