Daily Calorie & Protein Estimator

Estimate your daily calorie needs and optimal protein intake based on your body, activity level, and fitness goals.

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🧠 How Your Estimate is Calculated

Step 1: Basal Metabolic Rate (BMR)

This is the number of calories your body needs to perform basic life-sustaining functions if you were to rest for 24 hours. It's the starting point for your calculation.

We primarily use the Mifflin-St Jeor formula, a widely accepted standard. However, if you provide your body fat percentage, we can use the Katch-McArdle formula, which is generally more accurate for individuals with a known body composition as it considers lean body mass.

Step 2: Total Daily Energy Expenditure (TDEE)

Your TDEE is an estimate of the total calories you burn in a day, considering your BMR and all your activities. It's calculated by adding the following to your BMR:

  • Exercise Calories: Based on the Sport Hours per Week and Sport Intensity you provide. (See intensity examples below).
  • Activity from Steps: If you provide Average Steps per Day, we add approximately 0.04 kcal for each step.
  • NEAT (Non-Exercise Activity Thermogenesis): This accounts for calories burned from daily activities that aren't formal exercise (e.g., walking to work, fidgeting, chores). Your selected NEAT Level (Low, Average, High) adjusts for this.
  • Sleep Adjustment: Adequate sleep is important for metabolic health. If Average Sleep per Night is less than 6 hours, a slight downward adjustment (penalty) might be applied to your TDEE, as poor sleep can sometimes affect metabolism and energy expenditure.
Step 3: Calorie Goal Adjustment

Finally, your TDEE is adjusted based on your Fitness Goal to determine your recommended daily calorie intake:

  • Lose Weight: Your calorie goal is set to approximately 80% of your TDEE.
  • Maintain Weight: Your calorie goal is set to approximately 100% of your TDEE.
  • Gain Muscle: Your calorie goal is set to approximately 115% of your TDEE.
Step 4: Protein Target Recommendation

Your recommended protein intake is calculated based on your body weight and your selected Fitness Goal:

  • Lose Weight: Approximately 2.2 grams of protein per kilogram of body weight.
  • Maintain Weight: Approximately 1.6 grams of protein per kilogram of body weight.
  • Gain Muscle: Approximately 2.0 grams of protein per kilogram of body weight.

Protein is crucial for muscle repair, growth, and satiety, especially when adjusting calorie intake.

🏋️ Sport Intensity Examples

Light (~300 kcal/h): Walking (3–4 km/h), gentle yoga/stretching, light cycling (flat roads), Tai Chi, slow dancing.

Moderate (~450 kcal/h): Jogging (8–10 km/h), moderate cycling, steady swimming, Zumba/aerobic classes, moderate weight training.

Intense (~600+ kcal/h): Running (10+ km/h), CrossFit/HIIT, competitive sports (soccer, basketball), spinning/fast cycling, fast swimming laps.

🚶 NEAT Level Examples

Low: Desk job with minimal movement, driving everywhere, little walking, few chores or standing.

Average: Some walking (commuting, errands), light housework, taking stairs, standing or moving a few hours per day.

High: Active job (retail, service, delivery), walking/biking for transport, manual labor, frequent chores, standing most of the day.

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Disclaimer: This calorie estimator provides general information and guidance. It is not a substitute for professional medical or nutritional advice.