Water intake at 200 lb
How much water is enough? Use the form for your own numbers, or read the example for 200 lb with 30 minutes of exercise.
How it works
The estimate starts at 35 milliliters per kilogram of body weight. Each 30 minutes of exercise adds 350 milliliters. The page shows the total in milliliters, liters and ounces. This page converts 200 lb to 90.72 kg first, with 30 minutes of exercise.
Worked example
A person at 200 lb with 30 minutes of exercise is 90.72 kg. Multiply by 35: 90.72 × 35 = 3175.2 ml. Exercise adds 350 × 30 divided by 30 = 350 ml. The total is 3525.2 ml, or 3.53 liters. In ounces that is 3525.2 divided by 29.5735, which is 119.2. In cups it is 14.9.
Common questions
How many ounces or cups is that?
A US fluid ounce is 29.5735 milliliters and a cup is 8 ounces. At 200 lb with 30 minutes of exercise, 3525.2 ml is 119.2 ounces or 14.9 cups.
Do coffee and tea count toward my water?
Most drinks count toward your fluid total, though plain water is the simplest choice. At 200 lb with 30 minutes of exercise, 3.53 liters a day is about 15 cups spread across the day.
Does food count toward the total?
Food contains water. Treat the result as a goal for your total fluid across the day and not a quota for drinks alone. At 200 lb with 30 minutes of exercise, treat 3.53 liters as a goal for the day, not a quota for one sitting.
What if I exercise more or less than this?
Change the exercise minutes. Each 30 minutes adds 350 milliliters. At 30 minutes the page adds 350 ml. An extra 30 minutes would bring the total to 3875.2 ml.
Is 35 milliliters per kilogram right for everyone?
No. It is a common starting estimate. Heat, illness, pregnancy and some health conditions change needs. For 200 lb the starting figure is 3175.2 ml before exercise, and 3525.2 ml with 30 minutes of exercise.