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Mifflin-St Jeor Formula

TDEE
Calculator

Calculate your Total Daily Energy Expenditure — the exact calories your body burns every day based on your stats and activity level.

Biological Sex
Age15–80 years
yrs
Height
cm
Weight
kg
Activity Level
Your Daily Calories (TDEE)
-- kcal
BMR (Base)
To Lose Weight
To Gain Muscle
Protein Target
Activity Level Guide
LevelMultiplierExample
Sedentary×1.2Desk job, no exercise
Lightly Active×1.375Walk 1-3x/week
Moderately Active×1.55Gym 3-5x/week
Very Active×1.725Hard training 6-7x/week
Super Active×1.9Athlete or physical job

What Is TDEE and Why Does It Matter?

Your Total Daily Energy Expenditure (TDEE) is the total number of calories your body burns in a 24-hour period. It includes your Basal Metabolic Rate (BMR) plus energy used for physical activity and digestion. Without this number, any nutrition plan is guesswork.

The Mifflin-St Jeor Formula

This calculator uses the Mifflin-St Jeor equation, validated as the most accurate BMR formula for the general population and recommended by the Academy of Nutrition and Dietetics.

How to Use Your TDEE Result

For fat loss, subtract 300–500 kcal from your TDEE. For muscle gain, add 200–300 kcal. Adjust every 2–3 weeks based on real-world progress.