What Is TDEE? How to Calculate Your Total Daily Energy Expenditure

If you have ever wondered exactly how many calories you should eat to lose weight, maintain your current weight, or build muscle, TDEE is the number you need to know.

TDEE stands for Total Daily Energy Expenditure. It is the total number of calories your body burns in a single day, accounting for everything from breathing and digestion to exercise and daily movement. Once you know your TDEE, you have a precise starting point for any nutrition goal.

Use our TDEE Calculator to find your number instantly, or read on to understand exactly what it means and how to use it.

What Does TDEE Mean?

TDEE stands for Total Daily Energy Expenditure, the total calories your body uses in 24 hours.

It is made up of four components:

Your TDEE is the sum of all four. It is the most complete picture of your daily calorie burn.

BMR vs TDEE: What Is the Difference?

This is the most common point of confusion.

BMR (Basal Metabolic Rate) is the number of calories your body needs to survive if you did absolutely nothing all day, no movement, no eating, just lying completely still. It accounts for functions like breathing, circulation, cell repair, and organ function.

TDEE is always higher than BMR because it adds in everything else: the calories you burn moving, eating, and exercising on top of just existing.

Example:

• BMR: 1,600 calories (what your body burns at rest)
• TDEE: 2,200 calories (what your body actually burns on a typical active day)

If you eat based on your BMR instead of your TDEE, you will consistently underestimate how many calories you are burning, and either lose weight faster than intended or stall completely depending on your goal.

Always use TDEE, not BMR, as your calorie baseline.

How to Calculate TDEE

There are two ways to calculate TDEE: manually using a formula, or using a calculator.

Method 1: Use Our TDEE Calculator (Fastest)

Enter your age, height, weight, and activity level into our TDEE Calculator and get your number in seconds. This is the most accurate approach for most people.

Method 2: Calculate It Manually

Step 1: Calculate your BMR

The most widely used formula is the Mifflin-St Jeor equation:

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

Step 2: Multiply by your activity multiplier

Step 3: The result is your TDEE

Example calculation for a 30-year-old woman, 65kg, 165cm, moderately active:

BMR = (10 × 65) + (6.25 × 165) − (5 × 30) − 161
BMR = 650 + 1,031 − 150 − 161 = 1,370 calories

TDEE = 1,370 × 1.55 = 2,124 calories per day

This means she burns approximately 2,124 calories per day and needs to eat that amount to maintain her current weight.

How to Use TDEE for Weight Loss

Once you know your TDEE, using it for weight loss is straightforward.

Create a calorie deficit below your TDEE.

A deficit means eating fewer calories than your TDEE so your body is forced to use stored fat for energy.

The 500-calorie deficit rule is the most commonly recommended starting point. It produces roughly 0.5kg of fat loss per week without being so aggressive that it causes muscle loss, fatigue, or rebound hunger.

Important: Never go below 1,200 calories (women) or 1,500 calories (men) regardless of what your TDEE minus a deficit calculates to. Eating below these thresholds risks nutrient deficiencies and metabolic adaptation.

Use our Calorie Calculator to find your personalised calorie target based on your TDEE and weight loss goal.

How to Use TDEE for Muscle Gain

If your goal is to build muscle rather than lose fat, you need a calorie surplus, eating above your TDEE.

Most people trying to build muscle eat too little. If you are not gaining any weight after 2 to 3 weeks, you are likely at or below your TDEE, not above it.

What Affects Your TDEE?

Your TDEE is not fixed. These factors cause it to change over time:

Body weight. Heavier bodies burn more calories at rest. As you lose weight, your TDEE decreases. This is why weight loss slows down over time and calorie targets need to be recalculated periodically.

Muscle mass. Muscle tissue is metabolically active. It burns calories even at rest. More muscle equals higher BMR equals higher TDEE. This is one of the strongest arguments for strength training during weight loss.

Age. BMR typically decreases with age, partly due to gradual muscle loss. TDEE tends to drop by roughly 1 to 2% per decade after age 30.

Activity level. NEAT, the calories you burn through non-exercise movement like walking, standing, and fidgeting, varies enormously between people and has a massive impact on TDEE. Someone with a physically active job can have a TDEE 400 to 600 calories higher than someone with a desk job at the same body weight.

Hormones. Thyroid hormones, insulin, cortisol, and sex hormones all influence metabolic rate. Conditions like hypothyroidism can significantly reduce TDEE.

Diet composition. Protein has a thermic effect of 20 to 30%, meaning your body burns significantly more calories digesting protein than it does digesting carbs or fat. A higher-protein diet slightly raises your TDEE through this mechanism alone.

Why Your TDEE Might Be Lower Than the Calculator Says

TDEE calculators are accurate on average but individual results vary. The most common reasons your real TDEE might be lower than calculated:

Overestimating activity level. Most people select "moderately active" when their actual daily movement is closer to "lightly active." Be honest. If you sit at a desk most of the day and exercise 3 times a week, you are lightly to moderately active at best.

Metabolic adaptation. If you have been dieting for a long time, your body may have adapted by reducing NEAT (fidgeting less, moving less spontaneously) to conserve energy. This can reduce actual TDEE by 10 to 15% below what a calculator predicts.

Medical factors. Undiagnosed hypothyroidism, PCOS, or insulin resistance can lower your actual TDEE below predicted values.

If you are eating at what you believe is a 500-calorie deficit and not losing weight after 3 to 4 weeks, try reducing your calorie target by another 100 to 150 calories before assuming the calculator is wrong.

How Often Should You Recalculate Your TDEE?

Recalculate every 4 to 6 weeks during active weight loss, or any time your weight changes by more than 3 to 4kg. Since TDEE is partly based on body weight, a meaningful weight change means your TDEE has changed too.

Also recalculate if your activity level changes significantly. Starting a new exercise programme, changing jobs, or becoming more or less sedentary all shift your TDEE.

TDEE vs Other Calorie Methods

The most accurate approach long-term is to use your TDEE calculation as a starting point, then adjust based on actual results after 3 to 4 weeks. If you are losing more than 1kg per week, you are in too large a deficit. If you are losing nothing, your deficit is not large enough.

Frequently Asked Questions

What is a good TDEE for weight loss? There is no universally "good" TDEE, it depends entirely on your body size and activity level. What matters is eating 300 to 500 calories below whatever your TDEE is. Use our TDEE Calculator to find your number.

Is TDEE the same as maintenance calories? Yes. Your TDEE and your maintenance calorie level are the same thing, the number of calories at which your weight stays stable. Eat below it to lose weight, above it to gain.

How accurate are TDEE calculators? Most TDEE calculators using the Mifflin-St Jeor equation are accurate within 10% for most people. Use the result as a starting point and adjust based on real results after 3 to 4 weeks.

Can TDEE change without exercising more? Yes. NEAT (non-exercise movement) accounts for 15 to 30% of TDEE and varies significantly based on daily habits. Standing more, walking more, and generally being less sedentary can raise TDEE meaningfully without formal exercise.

What happens if I eat below my TDEE every day? You lose weight. The size of the deficit determines the rate of loss. A consistent 500-calorie daily deficit produces roughly 0.5kg of fat loss per week over time.

Should I eat back calories burned during exercise? If you used a sedentary or lightly active multiplier when calculating your TDEE and then exercise, yes, eating back some exercise calories is appropriate. If you used a multiplier that already accounts for your exercise frequency, do not eat them back as they are already included in your TDEE.

What is a typical TDEE for a woman? Most women have a TDEE between 1,600 and 2,400 calories per day depending on height, weight, age, and activity level. The average is roughly 2,000 calories, though this varies significantly.

What is a typical TDEE for a man? Most men have a TDEE between 2,000 and 3,000 calories per day. The average is roughly 2,500 calories, though athletic or physically active men can be considerably higher.

Calculate Your TDEE Now

Ready to find your number? Use our free TDEE Calculator, enter your details and get your maintenance calories, weight loss target, and muscle gain target instantly.

Once you know your TDEE, pair it with our Protein Calculator to make sure you are eating enough protein to preserve muscle while in a calorie deficit.

Reviewed by the WellMe Editorial Team. Content is for informational purposes only and does not constitute medical or nutritional advice. Consult a registered dietitian or healthcare professional for personalised guidance.