Watermelon is fairly low in carbs: a typical serving has roughly 8–12 grams of carbs.

Quick Scoop on Carbs in Watermelon

  • Per 100 grams (about 2/3 cup): around 7–8 grams of carbs.
  • Per 1 cup diced (about 150–152 grams): about 11–12 grams of total carbs , with roughly 0.5 grams of fiber (≈11 grams net carbs).
  • Per medium wedge (around 280–290 grams): about 21–22 grams of total carbs , mostly from natural sugars.

Most of these carbs come from natural sugars like fructose, glucose, and sucrose, with only a small amount of fiber.

HTML Table: Carbs in Watermelon

html

<table>
  <thead>
    <tr>
      <th>Serving size</th>
      <th>Total carbs (g)</th>
      <th>Fiber (g)</th>
      <th>Approx. net carbs (g)</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td>100 g watermelon</td>
      <td>7.6–8.3 g [web:1][web:3]</td>
      <td>0.4 g [web:1]</td>
      <td>≈7–8 g</td>
    </tr>
    <tr>
      <td>1 cup diced (152 g)</td>
      <td>≈11.5–12 g [web:1][web:9]</td>
      <td>0.5 g [web:9]</td>
      <td>≈11 g</td>
    </tr>
    <tr>
      <td>1 medium wedge (≈286 g)</td>
      <td>21.6 g [web:7]</td>
      <td>1.1 g [web:7]</td>
      <td>≈21 g</td>
    </tr>
  </tbody>
</table>

Watermelon is mostly water (about 90% by weight), so you get a sweet, refreshing snack with a moderate carb load compared with many other fruits.