Most healthy adults fall into a fairly simple range: around 90–130 ounces of fluid per day , depending on sex, size, and activity.

Quick Scoop

  • Many experts suggest about 125–131 oz daily for men (around 15–16 cups).
  • For women , guidelines land around 91–95 oz daily (about 11–12 cups).
  • These totals include all fluids plus water in foods (fruit, vegetables, soups).
  • A simple “good enough” target most adults use is about 64–80 oz of water from drinks, then let food and thirst cover the rest.
  • You may need more (20–30 extra ounces) if you exercise a lot, live in hot weather, or are breastfeeding.

What the big guidelines say

  • U.S. and medical organizations commonly recommend about 3.7 liters (≈125–131 oz) of total fluid for men and 2.7 liters (≈91–95 oz) for women per day.
  • In cups, that’s 15–16 cups for men and 11–12 cups for women , with 1 cup = 8 oz.
  • One review translates this to roughly 104–131 oz for men and 72–95 oz for women just from drinks, depending on how water‑rich your diet is.

Age & special situations (in ounces)

  • Kids 4–8 years: about 40 oz/day.
  • Kids 9–13 years: about 56–64 oz/day.
  • Teens 14–18 years: about 64–88 oz/day.
  • Pregnant: about 80 oz/day from drinks.
  • Breastfeeding: about 96–104 oz/day from drinks.

Easy rules of thumb

  • If you like simple rules, the familiar “8×8” rule (eight 8‑oz glasses = 64 oz) is a reasonable lower baseline for many adults, though many guidelines are higher.
  • A lot of people aim for 80–100 oz if they’re moderately active, which fits within modern ranges for many adults.
  • Let thirst, urine color (pale yellow), and how you feel guide fine‑tuning your exact number.

Simple intake table (HTML as requested)

html

<table>
  <thead>
    <tr>
      <th>Group</th>
      <th>Approx. daily fluid from drinks (oz)</th>
      <th>Notes</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td>Adult men</td>
      <td>~104–131 oz</td>
      <td>Total fluids often recommended ~125–131 oz including food.[web:1][web:3][web:5][web:7]</td>
    </tr>
    <tr>
      <td>Adult women</td>
      <td>~72–95 oz</td>
      <td>Total fluids often recommended ~91–95 oz including food.[web:1][web:3][web:5][web:7]</td>
    </tr>
    <tr>
      <td>Pregnant</td>
      <td>~80 oz</td>
      <td>About 10 cups of water from drinks.[web:3][web:8]</td>
    </tr>
    <tr>
      <td>Breastfeeding</td>
      <td>~96–104 oz</td>
      <td>About 12–13 cups of water from drinks.[web:3][web:8]</td>
    </tr>
    <tr>
      <td>Kids 4–8 yrs</td>
      <td>~40 oz</td>
      <td>About 5 cups/day.[web:3]</td>
    </tr>
    <tr>
      <td>Kids 9–13 yrs</td>
      <td>~56–64 oz</td>
      <td>About 7–8 cups/day.[web:3]</td>
    </tr>
    <tr>
      <td>Teens 14–18 yrs</td>
      <td>~64–88 oz</td>
      <td>About 8–11 cups/day.[web:3]</td>
    </tr>
  </tbody>
</table>

Quick bottom line

  • A practical starting point for most adults is 64–80 oz of water per day , then adjust up toward 90–130 oz total fluids based on sex, activity, heat, and how you feel.

Information gathered from public forums or data available on the internet and portrayed here.