TDEE Calculator

What is TDEE and Why Does it Matter?

TDEE (Total Daily Energy Expenditure) represents the total calories your body burns in 24 hours, combining your basal metabolic rate with all physical activity. Understanding your TDEE is crucial for weight management - whether you're trying to lose fat, build muscle, or maintain your current weight. Your TDEE serves as the baseline for calculating your optimal calorie intake.

The Science Behind TDEE Calculation

TDEE is calculated using the Mifflin-St Jeor equation, which is currently considered the most accurate formula for estimating BMR. The formula accounts for your weight, height, age, and biological sex, then multiplies by an activity factor ranging from 1.2 (sedentary) to 1.9 (extremely active).

For men: BMR = (10 × weight in kg) + (6.25 × height in cm) - (5 × age) + 5
For women: BMR = (10 × weight in kg) + (6.25 × height in cm) - (5 × age) - 161

Using TDEE for Weight Management

Once you know your TDEE, weight management becomes a simple math equation:

• Weight Loss: Eat 250-500 calories below TDEE for 0.5-1 lb/week loss
• Weight Maintenance: Eat at your TDEE to maintain current weight
• Muscle Gain: Eat 250-500 calories above TDEE for slow, lean bulk
• Aggressive Bulk: Eat 500-750 calories above TDEE (expect some fat gain)

Remember, these are starting points. Monitor your weight for 2-3 weeks and adjust based on actual results.

Common TDEE Mistakes to Avoid

Many people overestimate their activity level or underestimate their calorie intake. Be conservative with activity levels - most people with desk jobs are "Sedentary" or "Lightly Active" even if they exercise 3-4 times per week. Track your calories accurately using a food scale for at least two weeks to establish a baseline.