Daily Water Requirement Calculator

Daily water intake calculator

Just enter your weight and physical activity level and find your approximate personal daily suggested water consumption amount.

How much water should you drink every day? Nobody knows for sure and different people have different views. The USDA says people need from under one liter a day to nearly four liters a day depending on their age, sex and health status. One liter equals 4.23 cups.

– Newborns and infants need 0.7 to 0.8 liters of water a day from breast milk or formula.

– Toddlers need 1.3 liters and young children up to eight years need 1.7 liters daily.

– Boys, ages nine to 13 need 2.4 liters daily.

– Teenage boys and adult men need 2.7 liters.

– Girls, ages nine to 13 need 2.1 liters and teenage girls need 2.3 liters.

– Adult women need at least 2.7 liters of water each day.

– Women need at least 3 liters of water during pregnancy and 3.8 liters daily for lactation.

Recent studies have revealed that there is no set requirement of water per day. You should drink when you are thirsty. If your urine is white or slightly yellow, it’s a good indication that you are properly hydrated. But every individual has different water consumption requirements and it is difficult to apply a general rule.

Up to 80 percent of your body weight is water. Muscle tissue is comprised of mostly water and protein. Your body also needs water to help digestion, to stay cool, repair or regenerate cells, keep blood pumping through your veins and to help flush toxins out of your body. Your body uses different amounts of water for these activities everyday, and much more in hot, humid weather or during exercise.

Calculate how much water you should be drinking daily below:

Water Intake Calculator


Total Daily Workout Time

Please note that the water intake figures above are based on average recommended daily amounts and should therefore be taken as a guideline or indicator only. Consuming too much water can be as dangerous to your health as consuming too little, and every individuals water intake needs will vary with their body type and their activity level.