How to Calculate Your TDEE and Lose Weight Effectively

If you want to lose weight and keep it off, understanding your Total Daily Energy Expenditure (TDEE) is the most important first step. TDEE tells you how many calories your body burns each day, and once you know that number, creating an effective calorie deficit becomes straightforward.

What Is TDEE?

TDEE is the total number of calories you burn in a 24-hour period. It combines several components:

• Basal Metabolic Rate (BMR): The calories your body needs at complete rest to maintain basic functions like breathing, circulation, and cell repair. This accounts for 60% to 70% of total calorie burn.
• Thermic Effect of Food (TEF): The energy used to digest, absorb, and process food. This is roughly 10% of calorie intake.
• Physical Activity: Calories burned through exercise and daily movement. This is the most variable component, accounting for 15% to 30% of TDEE.
• Non-Exercise Activity Thermogenesis (NEAT): Calories burned through non-exercise movement like fidgeting, walking, and standing.

How to Calculate Your TDEE

Start by calculating your BMR using the Mifflin-St Jeor equation, which is considered the most accurate for most people:

• Men: BMR = (10 × weight in kg) + (6.25 × height in cm) − (5 × age) + 5
• Women: BMR = (10 × weight in kg) + (6.25 × height in cm) − (5 × age) − 161

Then multiply your BMR by an activity factor:

• Sedentary (desk job, little exercise): BMR × 1.2
• Lightly active (light exercise 1-3 days/week): BMR × 1.375
• Moderately active (moderate exercise 3-5 days/week): BMR × 1.55
• Very active (hard exercise 6-7 days/week): BMR × 1.725
• Extremely active (physical job + intense exercise): BMR × 1.9

Creating a Calorie Deficit for Weight Loss

To lose weight, you need to consume fewer calories than your TDEE. The size of your deficit determines how fast you lose weight:

• 250-calorie deficit: Lose approximately 0.5 pounds per week. Very sustainable, minimal hunger.
• 500-calorie deficit: Lose approximately 1 pound per week. The most commonly recommended rate.
• 750-calorie deficit: Lose approximately 1.5 pounds per week. Aggressive but manageable for people with more weight to lose.

Important: Never go below 1,200 calories per day (women) or 1,500 calories per day (men) without medical supervision. Extreme deficits slow your metabolism, cause muscle loss, and are not sustainable.

Adjusting Over Time

As you lose weight, your TDEE decreases because a smaller body burns fewer calories. Recalculate your TDEE every 10 to 15 pounds lost and adjust your calorie target accordingly. This is why weight loss plateaus are normal — your deficit shrinks as you get lighter.

Calculate Your TDEE Now

Use our calorie calculator to get your personalized TDEE and recommended calorie targets for your weight loss goal. Pair that with our BMI calculator to track your overall progress.

Sustainable weight loss is not about extreme diets or willpower — it starts with knowing your numbers and creating a moderate, consistent deficit you can maintain.