The U.S. National Academies of Sciences, Engineering, and Medicine actually does have a recommendation. For the average woman, it’s about 2.7 liters (91 ounces) of total water per day. For men, that number climbs to 3.7 liters (125 ounces).
But here’s the kicker: that’s total water, not just what you drink from a glass. About 20% of your daily intake comes from food—think juicy fruits, soups, and even that iceberg lettuce on your sandwich. So, the “drink” part is roughly 9 cups for women and 13 for men.
Think of it less like a strict math test and more like a loose recipe. Your body is a smart machine; it’s constantly adjusting based on your inputs.
When You’re a Thirsty Machine
Did you crush a hot yoga class? You’re going to need more. Are you eating a whole watermelon for a snack? Excellent—you’re already halfway there. The biggest variable is sweat. If you’re active or live in a dry climate, your baseline needs a bump.
Also, listen to your urine. Sounds gross, but it’s the ultimate cheat code for hydration. Pale, straw-colored? You’re golden. Dark as iced tea? Time to chug. Clear as tap water? You might be overdoing it.
Here’s a fun fact: your body is about 60% water. That’s roughly the same water composition as a banana. You are, essentially, a walking, talking piece of produce.
