Daily water requirement is calculated based on the combination of several factors. Weight, age, gender, and activity level are just a few of these factors. The formula can be used to calculate daily water requirement: Body weight (kg) x 0.03 = daily water requirement (liter). This formula can help calculate the daily water requirement for an average person. However, factors such as activity level, gender, and age can also affect daily water requirement. For example, someone who exercises more may need more water and in that case, the formula should be updated. Similarly, pregnant or breastfeeding women may also need more water.

An average person should drink 2-3 liters of water per day. However, this amount can vary based on factors such as weight, age, gender, activity level, and health condition. The correct way to determine the amount of water your body needs is to use the above tool, or to talk to a doctor or dietitian.

Water is important for maintaining hydration in the body, operating the digestive system, facilitating the elimination of waste products, sweating to remove excess fluid and electrolytes, and helping to reduce toxins in the body.