You can use age-based calorie ranges as a starting point, but the “right” number also depends on sex, height, activity level, and whether you want to lose, maintain, or gain weight.

Quick Scoop: Daily Calories by Age

These are generalized ranges for healthy people with normal weight and no special medical conditions. Think of them as ballpark targets, not strict rules.

Adults (19+ years)

Typical daily calorie ranges by age and sex:

html

<table>
  <thead>
    <tr>
      <th>Age</th>
      <th>Females (kcal/day)</th>
      <th>Males (kcal/day)</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td>19–30 years</td>
      <td>1,800–2,400</td>
      <td>2,400–3,000</td>
    </tr>
    <tr>
      <td>31–60 years</td>
      <td>1,600–2,200</td>
      <td>2,200–3,000</td>
    </tr>
    <tr>
      <td>61+ years</td>
      <td>1,600–2,200</td>
      <td>2,000–2,600</td>
    </tr>
  </tbody>
</table>

These ranges assume anything from sedentary to moderately active lifestyles; more intense daily activity pushes you toward the top of the range.

Children and Teens

For kids and teens, needs rise quickly with growth and activity.

html

<table>
  <thead>
    <tr>
      <th>Age</th>
      <th>Girls (kcal/day)</th>
      <th>Boys (kcal/day)</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td>2–4 years</td>
      <td>1,000–1,400</td>
      <td>1,000–1,600</td>
    </tr>
    <tr>
      <td>5–8 years</td>
      <td>1,200–1,800</td>
      <td>1,200–2,000</td>
    </tr>
    <tr>
      <td>9–13 years</td>
      <td>1,400–2,200</td>
      <td>1,600–2,600</td>
    </tr>
    <tr>
      <td>14–18 years</td>
      <td>1,800–2,400</td>
      <td>2,000–3,200</td>
    </tr>
  </tbody>
</table>

Pediatric sources also sometimes estimate needs per kilogram of body weight (for example, young children needing roughly 70–80 kcal/kg/day, decreasing as they age).

Sedentary vs Active

Activity level is a big swing factor.

  • Sedentary adults (little or no exercise) tend to sit near the lower end of their age range.
  • Moderately active adults (some exercise most days) sit around the middle.
  • Very active adults (hard exercise, physical jobs, athletes) may need at or above the top of the range.

Example: A 28‑year‑old man who sits most of the day may maintain on ~2,400 kcal, while a very active 28‑year‑old doing daily intense training might need 2,800–3,000+ kcal.

How to Personalize Your Number

For a more tailored estimate, health sites and medical references recommend using calorie calculators that plug in your age, sex, height, weight, and activity level (they’re usually based on equations like Mifflin‑St Jeor).

You should also adjust based on your goal:

  • Weight loss: Many people reduce roughly 300–500 kcal/day below their maintenance, but large or aggressive cuts can be unsafe.
  • Weight maintenance: Aim around your calculated maintenance range.
  • Weight gain: Add ~200–300 kcal/day above maintenance, focusing on nutrient‑dense foods.

Because too few calories can cause fatigue, nutrient deficiencies, and hormonal issues, it’s best to talk with a doctor or registered dietitian before making big changes, especially if you have existing medical conditions, are pregnant, or are under 18.

TL;DR: For many adults, daily needs fall somewhere around 1,600–2,400 kcal for women and 2,000–3,000 kcal for men depending on age and activity, with higher needs in the teens and 20s and gradually lower needs as you get older.