What is the hydration guideline regarding daily fluid intake?

• A. Half your body weight in ounces
• B. Half your body weight in liters
• C. Eight cups per day
• D. One liter per day

Answer: (A)

Daily fluid needs scale with body size, so a simple, personalized rule is to drink half your body weight in ounces each day. For example, someone weighing 180 pounds would aim for about 90 ounces of water daily (roughly 2.7 liters). This approach is more tailored than a fixed amount, because bigger people typically need more water than smaller people.

Fixed targets like eight cups (64 ounces) or one liter ignore this variation and can be too little for larger individuals or more than enough for smaller ones. Of course, activity level, climate, health conditions, and medications can increase or decrease your needs, so use this as a starting point and adjust accordingly.