Physical Activity (NEAT + EAT)

Non-exercise activity thermogenesis (NEAT)

Non-exercise activity thermogenesis (NEAT) is the calorie burn from daily movement: walking, standing, commuting, fidgeting, and chores. It is the most flexible part of Total Daily Energy Expenditure (Total Daily Energy Expenditure (TDEE)) and helps explain why two people with similar workouts can still have very different daily calorie needs.

Exercise activity thermogenesis (EAT)

Exercise activity thermogenesis (EAT) is structured exercise like lifting, running, cycling, and swimming. Together, NEAT + EAT describe your physical activity calories.

Why NEAT matters

  • NEAT can swing by hundreds of calories per day based on lifestyle and job demands.
  • Small habits (extra steps, standing breaks) add up over weeks.
  • When dieting, NEAT often drops unless you intentionally keep movement high.

Manual calories

When you know the total activity calories for a day (movement + workouts from a fitness tracker or other source), enter them directly. This method makes it possible to calculate a more precise Thermic Effect of Food (TEF) and therefore a more accurate Total Daily Energy Expenditure (TDEE) and maintenance calorie target.
Example: smartwatch shows Active calories: 620 kcal → enter 620.

  • Best for days with mixed NEAT + EAT where you have a single activity calorie estimate.
  • Pairs well with wearable data, step counts, or logged workouts.

Physical Activity Levels (PAL)

Physical Activity Levels (PAL) are activity multipliers that scale BMR to estimate total daily energy expenditure. They provide a quick way to estimate your daily calorie needs based on your typical activity level. Choose a level that matches your typical week when you do not have reliable activity calorie data or when you want a fast, consistent TDEE estimate.

  • Ideal for a quick estimate of daily calorie needs without detailed logs.
  • Less sensitive to week-to-week changes in NEAT and training volume.
  • Pick the level that matches your average week, not your best day.

Common PAL levels:

  • Minimal activity (x1.1): Bedridden or minimal mobility (e.g., only moving within the house). Virtually no steps, exclusively lying or sitting.
  • Lightly Active (x1.3): Predominantly sedentary or lying activities without significant daily movement. 2,000–3,000 steps per day, short walks at home, no additional physical activity.
  • Normally Active (x1.4): Sedentary job with occasional movement or short walks. 4,000–6,000 steps per day or 30 minutes of light activity (e.g., walking).
  • Moderately Active (x1.5): Sedentary job with more daily movement or regular walking. 8,000–10,000 steps per day or 45 minutes of moderate activity (e.g., brisk walking).
  • Active (x1.6): Sedentary job with a lot of daily movement or a light daily workout. 10,000–12,000 steps per day or 60 minutes of moderate activity (e.g., walking, cycling).
  • Very Active (x1.7): Mostly standing or walking work, supplemented with sports activities. 12,000–15,000 steps per day or 60–75 minutes of more intense activity (e.g., jogging).
  • Athlete (x2.3): A highly active lifestyle, usually including professional or intensive sports training. 20,000 steps per day or 2–3 hours of exercise (e.g., endurance or strength training).

How the calculator models physical activity

  • Manual calories let you plug in NEAT + EAT directly from your fitness tracking device or another source for a custom TDEE estimate.
  • Physical Activity Multipliers (PAL) bundle NEAT and EAT into a single factor for simplicity.
  • Switch modes anytime and press Calculate to refresh your snapshot.

Which method should you choose?

  • Use Manual calories if you have a wearable / step-based estimate.
  • Use PAL if you want consistency or no tracker data.
  • Recalculate after changes in job/activity/training.

Switch modes anytime on the calculator—just recalc afterward so the snapshot stays in sync. This keeps your NEAT, EAT, and physical activity calories aligned with your latest habits.

Disclaimer

This tool is for educational use only. It does not provide medical advice, diagnosis, or treatment.

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