Background: Water is the main component of the human body. The effect of an adequate fluid consumption is well-known and its relevance for the maintenance and promotion of health cannot be denied. Water is an essential nutrient for humans with several vital roles including: maintaining body functions, temperature and preventing dehydration. The human body consists of about 60% of water. The water in the body has numerous physiological roles: it is essential for the breathing (oxygen transport to the cells) and metabolism, digestion (absorption of nutrients). Nevertheless, many students ignore drinking water because of the modern lifestyle and the existence of alternatives to water. The previous studies notes that drinking water is connected with healthy dietary practices including reduced sugar-sweetened beverages consumption, but few studies considered the impact of drinking water on the total energy (calories) intake. Aim of study: This study was designed for evaluate of both plain water (pure water) and total water (water from pure water, beverages, and foods), and the intake is tested for its relationship with the daily energy intake, body mass index (BMI), and physical activity of students. Methods: This study was designed a cross-sectional descriptive study, a total number of 455 (231 females and 224 males) of medical college students were collected randomly, aged from 19-30 years, and collected from five medical faculties for all study years in the campus, ,food, fluid, and plain water intake of subjects was assessed, by 24-hour recall method. Dietary intake of subjects was analyzed manually by nutritionists. In this study, an assessment of the intake of both plain water (pure water) and total water (water from pure water, beverages, and foods) is performed, (drinking fluid values merged with data on the water content of foods and the rate of metabolic water were figured out. The mean of total and plain water intake made and analyzed (spss version20). .....