Water intake at 160 lb
Enter your weight and exercise time to estimate how much water to drink in a day. The example below is 160 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. On this page 160 lb with 30 minutes of exercise gives a weight term of 72.57 × 35 = 2539.95 ml.
Worked example
A person at 160 lb with 30 minutes of exercise is 72.57 kg. Multiply by 35: 72.57 × 35 = 2539.95 ml. Exercise adds 350 × 30 divided by 30 = 350 ml. The total is 2889.95 ml, or 2.89 liters. In ounces that is 2889.95 divided by 29.5735, which is 97.7. In cups it is 12.2.
Common questions
Do coffee and tea count toward my water?
Most drinks count toward your fluid total, though plain water is the simplest choice. At 160 lb with 30 minutes of exercise, 2.89 liters a day is about 12 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 160 lb with 30 minutes of exercise, treat 2.89 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 3239.95 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 160 lb the starting figure is 2539.95 ml before exercise, and 2889.95 ml with 30 minutes of exercise.
Can I drink too much water?
Yes, though it is uncommon. Drinking far more than you need in a short time can dilute the salts in your blood. Spread your intake through the day. At 160 lb with 30 minutes of exercise, spread over 16 waking hours, 2.89 liters is about 181 ml an hour.