Calorie Calculator
Estimate your Total Daily Energy Expenditure (TDEE) and find how many daily calories you need to lose, maintain, or gain weight.
Target Energy Breakdown
Calorie GoalsTDEE Intake Ready
Provide your age, height, and activity level to see custom calorie limits, nutritional macro dividers, and Zig-Zag schedules.
Understanding Total Daily Energy Expenditure (TDEE)
Your Total Daily Energy Expenditure (TDEE) represents the cumulative amount of calories you expend over a 24-hour cycle. It is composed of four primary physiological contributors:
- Basal Metabolic Rate (BMR): Your baseline rest energy cost, which claims about 60-75% of your total daily expenditure.
- Thermic Effect of Activity (TEA): Energy spent during formal sports, cardio sessions, or resistance training.
- Non-Exercise Activity Thermogenesis (NEAT): Calorie burn from trivial daily activity like pacing, cleaning, walking to work, or fidgeting.
- Thermic Effect of Food (TEF): The physiological energy cost required to digest, process, and absorb macronutrients (highest in proteins, requiring 20-30% of its own caloric energy to digest).
Safe Deficits vs. Extreme Crash Diets
Establishing a caloric deficit is mandatory for fat loss. However, massive deficits exceeding 1,000 calories can result in severe metabolic adaptation (metabolic slowing), bone density decline, hair thinning, and the catabolism of vital lean skeletal muscle tissue. A controlled, moderate deficit of 300 to 500 calories below your TDEE ensures sustainable fat reduction while preserving lean tissue and athletic performance.
Methodology & Formula: BMR × Physical Activity Level (PAL)
Standard Reference Calculations
Moderately Active Male (TDEE)
Sedentary Female (Weight Loss)
Frequently Asked Questions
Get answers to common queries based on clinical literature and fitness research.
A safe and sustainable calorie deficit is usually between 300 and 500 calories per day, which leads to a healthy weight loss of about 0.5 to 1 pound (0.2 to 0.5 kg) per week. Avoid extreme deficits below 1,200 calories (women) or 1,500 calories (men) unless recommended by a doctor.
You should re-calculate your calorie needs every time you lose or gain about 5 to 10 pounds (2 to 5 kg). As your body mass changes, your BMR and energy requirements also decrease or increase.