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What Is TDEE? Total Daily Energy Expenditure Explained
TDEE stands for Total Daily Energy Expenditure — the total number of calories your body burns in a 24-hour period, including everything from breathing to walking to digesting food.
The four components of TDEE
TDEE is made up of your Basal Metabolic Rate (BMR, the energy used at rest), the thermic effect of food (energy used to digest what you eat), non-exercise activity thermogenesis (walking, fidgeting, daily movement), and exercise activity.
For most people, BMR makes up the largest share of TDEE, often 60 to 75 percent, which is why metabolism feels so central to weight management even though activity still matters.
How to estimate your TDEE
The most common approach is to calculate BMR using an equation like Mifflin-St Jeor, then multiply it by an activity factor ranging from 1.2 (sedentary) to 1.9 (very active). This gives a reasonable estimate, though individual metabolisms vary by up to 10-15%.
Why TDEE matters for weight goals
Once you know your TDEE, you can set a calorie target: eat below it to lose weight, at it to maintain, or above it to gain. TDEE is an estimate, not a fixed number, so it's worth adjusting your intake every few weeks based on real-world results.
Put it into practice
Try the Calorie Calculator →
Estimate your daily calorie needs based on your goals.
Frequently Asked Questions
No. Two people with the same weight can have different TDEEs due to differences in muscle mass, activity level, age, and genetics.
Medical disclaimer
This article is for general informational and educational purposes only and isn’t a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider with questions about your specific health situation.
