Use this calculator to estimate your total daily calorie expenditure (TDEE), based on your age, body size, sex, and activity level.
What Is Daily Calorie Expenditure?
Daily calorie expenditure is the number of calories your body burns in a full day. It includes calories used for basic survival functions (breathing, circulation, body temperature), physical activity, and digestion. This number is commonly called TDEE (Total Daily Energy Expenditure).
Knowing your TDEE helps you make informed nutrition decisions. If you want to maintain your weight, you generally eat near your TDEE. If you want to lose fat, you usually eat below it. If you want to gain mass, you generally eat above it.
How This Calculator Works
This calculator estimates your calorie burn in two steps:
- Step 1: Calculate your BMR (Basal Metabolic Rate) using the Mifflin-St Jeor equation.
- Step 2: Multiply BMR by an activity factor to estimate your TDEE.
The result is a practical starting point, not a medical diagnosis. Real calorie expenditure can vary based on sleep, stress, hormones, training intensity, medications, and body composition.
Understanding Your Result
BMR (Basal Metabolic Rate)
BMR is the calories your body would burn at complete rest for 24 hours. Think of this as your baseline metabolic need.
TDEE (Total Daily Energy Expenditure)
TDEE includes your BMR plus movement and daily activity. This is the number most people use for meal planning.
Goal-Based Calorie Targets
- Mild fat loss: Around 250-350 calories below TDEE
- Standard fat loss: Around 400-600 calories below TDEE
- Lean gain: Around 200-300 calories above TDEE
Small adjustments are usually more sustainable than extreme deficits or surpluses.
How to Use This for Weight Management
For Fat Loss
Start with a moderate deficit and monitor weekly trends, not daily scale fluctuations. Aim for a gradual loss rate and protect muscle with adequate protein and resistance training.
For Maintenance
Eat close to your estimated TDEE and track your body weight for 2-3 weeks. If weight trends up or down, adjust calories slightly (usually 100-200 kcal/day).
For Muscle Gain
Use a small surplus. This usually improves training recovery without adding unnecessary fat. Pair with progressive strength training and consistent sleep.
Factors That Influence Calorie Burn
- Body weight and height
- Muscle mass
- Daily movement (steps, job demands, workouts)
- Training type and intensity
- Age and hormonal status
- Sleep quality and stress load
Because these factors change over time, your calorie needs also change. Recalculate every few months or after major body-weight changes.
Practical Tips for Better Accuracy
- Track body weight under consistent conditions (same time, same scale).
- Use weekly averages rather than reacting to single-day spikes.
- Track food intake honestly for at least 10-14 days.
- Adjust in small increments and reassess after 1-2 weeks.
Final Thoughts
A daily calorie expenditure calculator is a powerful planning tool. It gives you a data-informed baseline for fat loss, maintenance, or muscle gain. Use the estimate, observe real-world progress, and refine as needed. Consistency and good habits matter more than perfect precision.