How Many Calories Are in Water?

Written by Kyla Adams


Posted on December 21 2023

Water is a fundamental component of life, and its importance to our health cannot be overstated. It's a common belief that everything we consume has a caloric value, but what about water? Is it possible for this essential, life-sustaining liquid to contribute to our daily caloric intake? In this blog, we'll explore the concept of calories in water and debunk the myth that water has any caloric content.


The Science Behind Caloric Content:


Calories, also known as kilocalories, are units of energy derived from the food and beverages we consume. The energy comes from the macronutrients present in these substances: carbohydrates, proteins, and fats. Water, however, is a simple compound made up of hydrogen and oxygen and lacks these macronutrients.


Zero Calories in Water:


Water is unique in that it contains no macronutrients, making it calorie-free. In scientific terms, it has a caloric density of zero. This means that drinking water does not contribute any energy to our bodies in the form of calories. Instead, its primary role is to hydrate and facilitate various bodily functions.


Hydration and Metabolism:


While water itself may not contain calories, it plays a crucial role in our metabolism. Staying properly hydrated is essential for our bodies to function optimally. Water aids in digestion, nutrient absorption, temperature regulation, and the elimination of waste products. Drinking an adequate amount of water can also support weight management by promoting a feeling of fullness, potentially reducing overall calorie intake.


Dispelling Common Myths:


Despite the scientific consensus that water is calorie-free, some myths persist. One such myth suggests that cold water burns more calories than warm water because the body expends energy to bring it to body temperature. In reality, the caloric expenditure from this process is minimal and insignificant in terms of weight management.




In the quest for a healthy lifestyle, understanding the nutritional content of what we consume is crucial. When it comes to water, rest assured that it stands as a beacon of health with zero calories. While it may not contribute to our daily caloric intake, its role in hydration and supporting overall well-being cannot be overstated. So, the next time you drink water, whether in a glass, bottle or tumbler know that you're making a calorie-free and essential choice for your body. Stay hydrated, stay healthy!