Water intake, low activity
Enter your weight and exercise minutes above. The example shows 163 lb with no exercise, a low activity day.
How it works
Multiply your weight in kilograms by 35 to get milliliters of water. Add 350 milliliters for every 30 minutes of exercise. The page converts the total to liters and ounces. At 163 lb with no exercise, the body weight part of the target is 2587.9 milliliters.
Worked example
Take a person who weighs 163 lb with no exercise. In metric that is 73.94 kg. Multiply by 35: 73.94 × 35 = 2587.9 ml. There is no exercise. Nothing is added. The total is 2587.9 ml. Divide by 1000 to get 2.59 liters. Divide 2587.9 by 29.5735 to get 87.5 ounces. Divide by 8 to get 10.9 cups.
Common questions
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 163 lb with no exercise, spread over 16 waking hours, 2.59 liters is about 162 ml an hour.
How many ounces or cups is that?
A US fluid ounce is 29.5735 milliliters and a cup is 8 ounces. At 163 lb with no exercise, 2587.9 ml is 87.5 ounces or 10.9 cups.
Do coffee and tea count toward my water?
Most drinks count toward your fluid total, though plain water is the simplest choice. At 163 lb with no exercise, 2.59 liters a day is about 11 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 163 lb with no exercise, treat 2.59 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 0 minutes the page adds 0 ml. An extra 30 minutes would bring the total to 2937.9 ml.