TDEE Calculator

Use this free TDEE calculator to estimate your Total Daily Energy Expenditure based on your age, weight, height, gender, and activity level. TDEE represents the total number of calories your body burns each day, including basic bodily functions like breathing and circulation, as well as the energy used during daily activities and exercise. Understanding your TDEE can help you determine how many calories you should eat to maintain your current weight, lose body fat, or build muscle more effectively. By calculating your daily calorie needs, you can create a more accurate and sustainable nutrition and fitness plan tailored to your body and lifestyle.

What is TDEE?
How To Calculate TDEE Accurately
TDEE for Weight Loss
TDEE for Muscle Gain
TDEE by Activity Level

What Is TDEE?

TDEE stands for Total Daily Energy Expenditure. It represents the total number of calories your body burns in a full day, including all physical activity and basic biological functions.

Every day your body uses energy to perform essential processes such as:

Breathing
Circulating blood
Digesting food
Maintaining body temperature
Supporting brain function
Moving and exercising

TDEE includes all of these calorie expenditures combined.

Understanding your TDEE is one of the most important steps when managing body weight. Once you know how many calories your body burns each day, you can determine how many calories you should eat to:

Lose fat
Gain muscle
Maintain your current weight

Healthcare organisations such as the World Health Organization and the National Health Service often reference energy balance when discussing healthy weight management.

A TDEE calculator estimates your daily calorie burn based on your body characteristics and activity level.

Why TDEE Is Important

Knowing your Total Daily Energy Expenditure provides the foundation for understanding how your body uses energy.

Your TDEE determines the number of calories required to maintain your current weight.

Once you know this number, you can adjust calorie intake depending on your goal.

For fat loss

Eat fewer calories than your TDEE to create a calorie deficit.

For muscle gain

Eat more calories than your TDEE to create a calorie surplus.

For weight maintenance

Eat approximately the same number of calories as your TDEE.

Understanding TDEE allows you to make informed decisions about nutrition and weight management rather than relying on guesswork.

How This TDEE Calculator Works

This TDEE calculator estimates how many calories your body burns each day using a two-step process.

First, it calculates your Basal Metabolic Rate (BMR).

Then it adjusts that number based on your activity level.

Step 1: Calculating Your Basal Metabolic Rate (BMR)

Your Basal Metabolic Rate (BMR) represents the number of calories your body burns at complete rest.

These calories support essential bodily functions such as:

Breathing
Circulation
Brain activity
Hormone production
Cell repair

BMR accounts for the largest portion of your daily calorie burn, typically around 60–70% of your total energy expenditure.

This calculator estimates BMR using the Mifflin‑St Jeor equation.

The formula was developed by researchers Mark D. Mifflin and Sachiko T. St Jeor and is widely regarded as one of the most accurate metabolic formulas available.

Step 2: Adjusting for Activity Level

Once BMR has been calculated, it is multiplied by an activity factor to estimate your total daily calorie burn.

This produces your Total Daily Energy Expenditure (TDEE).

Activity levels generally fall into several categories.

Sedentary

Little or no exercise. Most of the day is spent sitting.

Lightly active

Light exercise or physical activity 1–3 days per week.

Moderately active

Moderate exercise or sports 3–5 days per week.

Very active

Hard exercise or physically demanding work most days.

Extremely active

Very intense training or physically demanding jobs combined with regular workouts.

The more active you are, the higher your TDEE will be because your body burns more calories through movement.

Components of TDEE

Your Total Daily Energy Expenditure is made up of several different components.

Each of these contributes to the number of calories your body burns each day.

Basal Metabolic Rate (BMR)

As mentioned earlier, BMR represents the energy required to keep your body alive at rest.

This includes essential functions such as:

Heartbeat
Breathing
Brain activity
Cellular repair

BMR is responsible for the majority of your daily calorie expenditure.

Physical Activity

Exercise and daily movement significantly increase calorie burn.

Examples include:

Walking
Running
Strength training
Cycling
Sports

People who exercise regularly typically have higher TDEE values than sedentary individuals.

Non-Exercise Activity Thermogenesis (NEAT)

NEAT refers to calories burned during everyday movement that is not structured exercise.

Examples include:

Walking around the house
Standing
Cleaning
Fidgeting
Climbing stairs

Although these activities seem small, they can contribute significantly to total calorie burn.

Thermic Effect of Food (TEF)

Your body also burns calories while digesting and processing food.

This is known as the thermic effect of food.

Different nutrients require different amounts of energy to digest.

Protein generally has the highest thermic effect, meaning the body burns more calories digesting it compared with carbohydrates or fat.

TDEE for Fat Loss

If your goal is fat loss, your calorie intake must be lower than your TDEE.

This creates a calorie deficit, which forces the body to use stored fat as an energy source.

For example:

TDEE = 2,400 calories

Fat loss intake = 1,900–2,100 calories

A moderate calorie deficit of 300–500 calories per day is commonly recommended for sustainable fat loss.

This allows gradual fat loss while maintaining energy levels and muscle mass.

TDEE for Muscle Gain

If your goal is muscle gain, you need to eat more calories than your TDEE.

This creates a calorie surplus, providing your body with extra energy to build muscle tissue after resistance training.

For example:

TDEE = 2,400 calories

Muscle gain intake = 2,600–2,800 calories

A moderate calorie surplus combined with strength training can help maximise muscle growth while limiting fat gain.

TDEE for Weight Maintenance

If your goal is weight maintenance, your calorie intake should be roughly equal to your TDEE.

This means the calories you consume are balanced with the calories your body burns.

When calorie intake matches calorie expenditure, body weight tends to remain stable over time.

Many people use TDEE calculations to maintain a healthy weight once they reach their fitness goals.

Factors That Affect TDEE

Several factors influence how many calories your body burns each day.

Age

Metabolism tends to slow slightly with age due to natural declines in muscle mass and hormonal changes.

Body Size

Larger individuals generally burn more calories because their bodies require more energy to function.

Muscle Mass

Muscle tissue burns more calories than fat tissue, even when the body is at rest.

People with higher muscle mass often have higher TDEE values.

Activity Level

Physical activity significantly increases daily calorie burn.

Individuals with physically demanding jobs or active lifestyles tend to have higher TDEE values.

Genetics

Genetic factors can influence metabolic rate and energy expenditure.

Some people naturally burn calories faster than others.

Is This TDEE Calculator Accurate?

This TDEE calculator uses the Mifflin-St Jeor equation, which is widely considered one of the most accurate formulas available for estimating metabolic rate.

It is commonly used by:

Nutritionists
Dietitians
Personal trainers
Sports scientists

Although the calculation provides an estimate rather than an exact measurement, it offers a reliable starting point for determining daily calorie needs.

Most people achieve the best results by tracking progress and adjusting calorie intake gradually based on real-world results.