Find Out Tdee Calculator

TDEE Calculator: Find Out Your Daily Calorie Needs

Estimate your Total Daily Energy Expenditure (TDEE) to understand your daily calorie requirements for maintenance, weight loss, or gain.

TDEE Calculator

Age (years):

Enter your age in years (1-120).

Gender:

Weight Unit:

Weight (kg):

Height Unit:

Height (cm):

Activity Level:

BMR Formula:

Total Daily Energy Expenditure (TDEE)

—

Calories/day

Basal Metabolic Rate (BMR): — Calories/day

Activity Multiplier: —

For Mild Weight Loss (0.5 kg/week): — Calories/day

For Weight Loss (1 kg/week): — Calories/day

For Mild Weight Gain (0.5 kg/week): — Calories/day

Your TDEE is calculated based on your BMR (calories your body burns at rest) multiplied by your activity level.

Calorie Breakdown

Visual representation of BMR, TDEE, and calorie goals.

Activity Level Multipliers

Activity Level	Description	Multiplier
Sedentary	Little or no exercise, desk job	1.2
Lightly Active	Light exercise or sports 1-3 days a week	1.375
Moderately Active	Moderate exercise or sports 3-5 days a week	1.55
Very Active	Hard exercise or sports 6-7 days a week	1.725
Extra Active	Very hard exercise or sports, and a physical job	1.9

Activity multipliers used to calculate TDEE from BMR.

What is TDEE (Total Daily Energy Expenditure)?

Total Daily Energy Expenditure (TDEE) is an estimation of how many calories your body burns in a 24-hour period, including all activities from sleeping and breathing to exercising and working. It’s the total amount of energy you expend each day. Understanding your TDEE is crucial for managing your weight, whether you aim to lose, gain, or maintain it. The TDEE calculator helps you find out this important number.

Your TDEE is composed of several components:

Basal Metabolic Rate (BMR): The number of calories your body needs to perform basic life-sustaining functions like breathing, circulation, and cell production while at rest.
Thermic Effect of Food (TEF): The calories burned during the digestion, absorption, and metabolism of food.
Exercise Activity Thermogenesis (EAT): Calories burned during planned, structured exercise.
Non-Exercise Activity Thermogenesis (NEAT): Calories burned from activities other than formal exercise, like walking, fidgeting, and doing household chores.

A TDEE calculator typically uses your BMR and multiplies it by an activity factor to estimate your TDEE.

Who should use a TDEE calculator?

Anyone interested in understanding their daily calorie needs can benefit from using a TDEE calculator. It’s particularly useful for individuals looking to:

Lose weight: By knowing your TDEE, you can create a calorie deficit (consume fewer calories than your TDEE).
Gain weight/muscle: You can aim for a calorie surplus (consume more calories than your TDEE).
Maintain weight: You can aim to consume calories close to your TDEE.
Optimize athletic performance: Athletes need to fuel their bodies appropriately based on their high energy expenditure.

Common Misconceptions

One common misconception is that the TDEE value is exact. It’s an estimate. Individual metabolisms can vary, and activity levels can fluctuate daily. The TDEE calculator provides a very good starting point, but you may need to adjust your calorie intake based on your results over time. Another misconception is that you must hit your TDEE number exactly every day; looking at your average intake over a week is often more practical.

TDEE Calculator Formula and Mathematical Explanation

The TDEE calculator first calculates your Basal Metabolic Rate (BMR) using one of several formulas, most commonly the Mifflin-St Jeor or Harris-Benedict equation, and then multiplies it by an activity factor.

1. Calculate BMR:

Mifflin-St Jeor Equation (considered more accurate):

For Men: BMR = (10 × weight in kg) + (6.25 × height in cm) – (5 × age in years) + 5
For Women: BMR = (10 × weight in kg) + (6.25 × height in cm) – (5 × age in years) – 161

Harris-Benedict Equation (Original):

For Men: BMR = 88.362 + (13.397 × weight in kg) + (4.799 × height in cm) – (5.677 × age in years)
For Women: BMR = 447.593 + (9.247 × weight in kg) + (3.098 × height in cm) – (4.330 × age in years)

2. Calculate TDEE:

TDEE = BMR × Activity Multiplier

The Activity Multiplier is chosen based on your self-reported activity level (see the table above).

Variables Table

Variable	Meaning	Unit	Typical Range
Weight	Body weight	kg or lbs	30-200 kg / 66-440 lbs
Height	Body height	cm or ft/in	100-220 cm / 3’3″-7’3″
Age	Age in years	years	1-120
Gender	Biological sex	Male/Female	N/A
Activity Multiplier	Factor representing physical activity level	N/A	1.2 – 1.9
BMR	Basal Metabolic Rate	Calories/day	1000-3000
TDEE	Total Daily Energy Expenditure	Calories/day	1200-5000+

Practical Examples (Real-World Use Cases)

Example 1: Moderately Active Male

Inputs:

Age: 35 years
Gender: Male
Weight: 80 kg
Height: 180 cm
Activity Level: Moderately Active (Multiplier 1.55)
Formula: Mifflin-St Jeor

Calculation:

BMR = (10 * 80) + (6.25 * 180) – (5 * 35) + 5 = 800 + 1125 – 175 + 5 = 1755 Calories/day
TDEE = 1755 * 1.55 = 2720.25 Calories/day (approx. 2720)

Interpretation: This individual needs around 2720 calories per day to maintain his current weight. To lose about 0.5 kg (1 lb) per week, he would aim for 2220 calories per day (a 500-calorie deficit).

Example 2: Lightly Active Female

Inputs:

Age: 28 years
Gender: Female
Weight: 60 kg
Height: 165 cm
Activity Level: Lightly Active (Multiplier 1.375)
Formula: Mifflin-St Jeor

Calculation:

BMR = (10 * 60) + (6.25 * 165) – (5 * 28) – 161 = 600 + 1031.25 – 140 – 161 = 1330.25 Calories/day (approx. 1330)
TDEE = 1330 * 1.375 = 1828.75 Calories/day (approx. 1829)

Interpretation: This woman needs about 1829 calories daily to maintain her weight. For mild weight gain of 0.5 kg per week, she might aim for around 2329 calories per day (a 500-calorie surplus).

How to Use This TDEE Calculator

Enter your Age: Input your current age in years.
Select your Gender: Choose between Male and Female.
Enter your Weight: Select your preferred unit (kg or lbs) and enter your current weight.
Enter your Height: Select your preferred unit (cm or ft/in) and enter your height.
Select your Activity Level: Choose the option that best describes your typical weekly activity. Be honest for an accurate estimate.
Choose the Formula: Mifflin-St Jeor is generally recommended, but you can select Harris-Benedict.
Click “Calculate TDEE” (or results update live): The calculator will display your estimated TDEE, BMR, and calorie targets for weight loss and gain.

How to Read Results

The main result is your TDEE in calories per day. This is the estimated number of calories you need to consume daily to maintain your current weight. The intermediate results show your BMR (calories burned at rest) and suggested calorie intakes for mild (0.5 kg/week) and moderate (1 kg/week) weight loss, and mild weight gain. Our TDEE calculator provides these for guidance.

Decision-Making Guidance

Use your TDEE as a starting point. If your goal is weight loss, aim for a consistent calorie deficit (e.g., 300-500 calories below TDEE per day). If your goal is muscle gain, aim for a modest surplus (e.g., 300-500 calories above TDEE per day) combined with resistance training. Track your weight and adjust your intake every few weeks based on your progress.

Key Factors That Affect TDEE Results

Age: Metabolic rate generally decreases with age due to muscle mass loss.
Gender: Men typically have more muscle mass and a higher BMR than women of the same age and weight.
Weight: Heavier individuals require more energy to move and maintain their bodies.
Height: Taller individuals have a larger surface area and often a higher BMR.
Body Composition: Muscle tissue burns more calories at rest than fat tissue. Two people of the same weight but different body compositions will have different BMRs. Our TDEE calculator doesn’t directly account for body composition, but it’s a factor.
Activity Level: This is the most variable factor and significantly impacts TDEE. The more active you are, the more calories you burn.
Genetics: Some people have naturally faster or slower metabolisms.
Hormonal Factors: Hormones like thyroid hormones can influence metabolic rate.
Diet and Thermic Effect of Food (TEF): The types of food you eat influence TEF (protein has a higher TEF than fats or carbs), though it’s a smaller component of TDEE.

Frequently Asked Questions (FAQ)

1. How accurate is the TDEE calculator?: The TDEE calculator provides a good estimate based on established formulas. However, it’s an estimate. Individual variations exist, so it’s a starting point, not an exact number.
2. Which formula is more accurate: Mifflin-St Jeor or Harris-Benedict?: The Mifflin-St Jeor equation is generally considered more accurate for most people than the older Harris-Benedict equation, especially for those who are overweight or obese.
3. How often should I recalculate my TDEE?: You should recalculate your TDEE if you experience a significant change in weight (5-10% or more), change your activity level substantially, or after every few months of a weight loss/gain phase.
4. Can I eat the same number of calories every day?: While you can, it’s often more practical to look at your average weekly calorie intake. Some days you might eat a little more, some days a little less, but the weekly average should align with your goals based on your TDEE.
5. Does the TDEE calculator account for body composition (muscle vs. fat)?: No, the standard formulas used by most TDEE calculators (Mifflin-St Jeor and Harris-Benedict) do not directly account for body composition. They rely on weight, height, age, and gender. More advanced formulas like Katch-McArdle do, but require body fat percentage.
6. What if I am very muscular or have very little muscle?: If you are very muscular, your BMR and TDEE might be slightly higher than the calculator estimates. If you have very low muscle mass, it might be slightly lower.
7. How many calories should I subtract for weight loss?: A common recommendation is to create a deficit of 300-500 calories per day from your TDEE to aim for a sustainable weight loss of about 0.5-1 kg (1-2 lbs) per week. Don’t go too low, especially below your BMR for extended periods without guidance.
8. How do I accurately estimate my activity level?: Be honest about your typical week. Don’t overestimate your activity. If in doubt, choose the lower activity level and adjust based on your results.