Water Intake Calculator

This water calculator can help you determine how much water you should drink as a daily requirement so that you don’t have to worry about drinking too little or too much. Besides the water calculator, more relevant information and health tips can be found below.

How does the water calculator work?

This water intake calculation tool helps you determine how much water you need to drink by taking various factors into consideration. For instance, this water calculator asks you to provide your age and gender. Once you’ve provided all the necessary information, the amount of water you need will be displayed.

Our water calculation tool is based on Adequate Intakes (AI) measure, which is the median total water intake from U.S. survey data:

Why is water intake so important?

Water is essential for our bodies to function properly. It is important that our bodies receive the right amount of fluids for our needs.

Meeting your daily water requirements will keep you away from dehydration, increase your performance and even take you on the way to a healthier, leaner body.

The total fluid intake consists of water, other beverages drunk and water from foods eaten. According to the Institute of Medicine, about 80 percent of the water you consume each day comes from water and beverages, and about 20 percent is derived from the foods.

What if it’s too little or too much?

When you know exactly what your body wants, you can prevent yourself from either drinking too little or too much. Drinking too little water and be prone to dehydration, with symptoms like headaches, fatigue, heartburn or lack of concentration. Drinking too much water and have a risk to develop hyponatremia or water intoxication that triggers cell ruptures in different parts of the body and symptoms like vomiting, headaches, confusion and later seizures and coma.

Example calculation of water intake

For a female, aged 28, the daily water intake is of around 3.7 liters, with about 3 L comes from beverages.