What does TDEE stand for?

TDEE stands for Total Daily Energy Expenditure. It's the total number of calories your body burns in a day, including rest, daily movement and exercise.

How is TDEE calculated?

TDEE is calculated by first estimating your Basal Metabolic Rate (the calories you burn at rest) using an equation like Mifflin-St Jeor, then multiplying it by an activity factor that reflects how active you are.

What's the difference between BMR and TDEE?

BMR is the calories your body burns at complete rest, just to stay alive. TDEE is your BMR plus all the extra calories you burn through daily activity and exercise, so it's always higher.

How accurate is a TDEE calculator?

TDEE calculators give a solid estimate, usually within about 10 percent for most people. Real metabolism varies, so use the result as a starting point and adjust based on how your weight responds over a few weeks.

Does TDEE change as you lose weight?

Yes. A lighter body burns fewer calories, so your TDEE drops as you lose weight. This is why progress slows over time and why you may need to recalculate every few kilos.

Should I eat my TDEE or below it?

Eat around your TDEE to maintain weight, below it to lose, and above it to gain. For fat loss, a deficit of 300 to 500 calories below your TDEE suits most people.

Why is my TDEE different on other calculators?

Different calculators use slightly different equations and activity multipliers, so small differences are normal. What matters most is picking one, using it consistently, and adjusting based on real results.

What Is TDEE and How Do You Calculate It?

If you’ve ever tried to lose or gain weight, you’ve run into the same question: how many calories do you actually burn in a day? That number is your TDEE, and it’s the single most useful figure for managing your weight. Here’s what it means and how to find yours.

The short answerTDEE (Total Daily Energy Expenditure) is the total calories you burn in a day. Eat around it to maintain weight, below it to lose, and above it to gain. It's your BMR multiplied by an activity factor.

What TDEE actually means

TDEE stands for Total Daily Energy Expenditure. It’s everything your body burns in 24 hours, added up: keeping your organs running, walking to the kitchen, typing, fidgeting, and any exercise you do.

Think of it as your daily calorie “budget”. Spend exactly that and your weight holds steady. Spend less and you lose; spend more and you gain. Almost all weight management comes down to this one comparison.

How TDEE is calculated

TDEE is built in two steps.

First, your BMR (Basal Metabolic Rate): the calories you’d burn lying in bed all day, doing nothing. This covers the basics like breathing, circulation and keeping your cells alive. It’s usually the biggest chunk of your total, often 60 to 70 percent.

The most trusted way to estimate BMR is the Mifflin-St Jeor equation, which uses your sex, age, height and weight.

Second, that BMR is multiplied by an activity factor that reflects how much you move:

Activity level	Multiplier
Sedentary (little exercise)	1.2
Lightly active (1 to 3 days/week)	1.375
Moderately active (3 to 5 days/week)	1.55
Very active (6 to 7 days/week)	1.725
Extremely active (hard daily training)	1.9

BMR times your activity factor gives your TDEE. Our TDEE calculator does the whole thing for you, and adds a macro split on top.

BMR vs TDEE: the difference

People mix these up, so to be clear:

BMR is what you burn at complete rest.
TDEE is BMR plus everything else you do.

Your TDEE is always higher than your BMR, even if you’re sedentary, because you still move around a little during the day.

How to use your TDEE

Once you have your number, the rest is simple:

To maintain weight: eat around your TDEE.
To lose fat: eat below it, a deficit of 300 to 500 calories suits most people. See our calorie deficit calculator.
To build muscle: eat slightly above it, a surplus of around 200 to 300 calories, paired with training.

It's a starting point, not gospel. Every TDEE estimate carries a margin of around 10 percent. Use your number for a few weeks, watch how your weight responds, and adjust up or down from there.

Putting it together

Calculate your TDEE with the TDEE calculator.
Decide your goal: maintain, lose or gain.
Adjust from your TDEE accordingly.
Track and tweak based on real results over three to four weeks.

Get this one number and almost every other calorie decision becomes straightforward.

welanutria provides general information and estimates only, and is not medical or dietary advice. Speak with a qualified professional before making significant changes to your diet, exercise or health routine.