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TDEE Calculator - Calculate Your Total Daily Energy Expenditure

Ready to calculate
Mifflin-St Jeor Formula.
5 Activity Levels.
Cut, Maintain & Bulk Targets.
100% Free.
No Data Stored.

How it Works

01Enter Your Body Stats

Input your age, sex, height, and current weight. These are used to calculate your Basal Metabolic Rate (BMR) — the calories you burn at complete rest.

02Select Your Activity Level

Choose from 5 activity levels: Sedentary, Lightly Active, Moderately Active, Very Active, or Extra Active. This multiplier converts BMR into your full daily calorie expenditure.

03Get Your TDEE

Your Total Daily Energy Expenditure is your BMR multiplied by the activity factor. This is the number of calories you burn each day maintaining your current weight.

04Use TDEE for Your Calorie Goal

To lose weight: eat 300–500 calories below TDEE. To gain muscle: eat 300–500 above. To maintain: eat at TDEE. The calculator shows all three target ranges.

What is a TDEE Calculator?

Tdee Calculator tool interface with upload form on toolsace.io
If you've ever tried to manage your weight through diet and exercise, you've probably felt the frustration of not knowing exactly how many calories your body actually needs each day. That number — your Total Daily Energy Expenditure — is what our TDEE Calculator determines for you. By combining your Basal Metabolic Rate with your actual activity level, it gives you the most accurate possible estimate of your real-world daily calorie burn, which is the essential foundation for any effective nutrition plan.

TDEE is the sum of your BMR (the calories your body burns at rest) plus the additional calories burned through daily activities and exercise. Our calculator uses the Mifflin-St Jeor equation for BMR — the most accurate formula available — and then applies activity multipliers that range from sedentary (desk job, little exercise) to extremely active (intense training multiple times per day). Choosing the right activity level is critical: most people underestimate how active they truly are, which is one of the most common causes of stalled weight loss progress.

Knowing your TDEE takes the guesswork out of nutrition. Eat at your TDEE to maintain weight. Create a moderate deficit (500 calories) to lose about half a kilo per week. Eat above your TDEE to gain. It's simple in principle, and this calculator makes it precise in practice. Free, fast, works on any device.

Pro Tip: For more relevant tools in the health category, try our BMI Tool.

How to Calculate Your TDEE?

Vital Stats: Enter your age, gender, height, and current weight.
Select Activity: Choose the activity level that best matches your weekly routine.
Optional Precision: Enter Body Fat % for the advanced Katch-McArdle model.
Review Results: Analyze your daily and weekly maintenance baselines.

How do I calculate my TDEE?

Your TDEE is calculated in two primary stages:

Stage 1: Basal Metabolic Rate (BMR)

We use the Mifflin-St Jeor Equation, the clinical gold standard:

Men: (10 × weight in kg) + (6.25 × height in cm) - (5 × age) + 5

Women: (10 × weight in kg) + (6.25 × height in cm) - (5 × age) - 161

Stage 2: Activity Multipler (PAL)

Your BMR is multiplied by a Physical Activity Level (PAL) to determine total burn:

Sedentary
x 1.2
Light
x 1.375
Moderate
x 1.55
Very Active
x 1.725
Extra Active
x 1.9

Final Equation

TDEE = BMR × PAL

Metabolic case study

Jordan

Metabolism Verified

Activity Status

Moderately Active

Metabolic Capacity

2,450 kcal/day

"Jordan is highly active, training 4 days a week. With a BMR of 1,600 kcal and an activity multiplier of 1.55, the maintenance TDEE is 2,450 kcal. To lose fat safely, Jordan targets a 500 kcal deficit, consuming 1,950 kcal daily."

Activity Multipliers (K-Factors)

LevelMultiplierDescription
Sedentary1.2Little or no exerciseDesk job, low movement
Lightly Active1.375Light exercise 1-3 days/weekActive hobbies, walking
Moderately Active1.55Moderate exercise 3-5 days/weekRegular gym, active job
Very Active1.725Hard exercise 6-7 days/weekLabor intensive job
Extra Active1.9Very hard exercise & physical jobAthlete training 2x/day

The Four Pillars of TDEE Calculation

Our calculator doesn't just guess; it breaks down your metabolism into four primary components:



  1. 1.Basal Metabolic Rate (BMR): The energy required to keep your heart beating, lungs breathing, and brain functioning while at absolute rest.

  2. 2.Non-Exercise Activity Thermogenesis (NEAT): Calories burned during daily movements like walking, standing, typing, and fidgeting.

  3. 3.Thermic Effect of Exercise (TEE): Energy expended during intentional physical activity, such as weightlifting or cardio.

  4. 4.Thermic Effect of Food (TEF): The metabolic cost of digesting, absorbing, and storing nutrients from the food you eat.

Advanced Metabolic Formulas

We utilize the most respected mathematical models in nutritional science to ensure peak accuracy:

  • 1.Mifflin-St Jeor: Currently considered the gold standard for healthy adults. It is lauded for its high degree of accuracy in modern populations.
  • 2.Revised Harris-Benedict: A classic formula updated to reflect modern body compositions.
  • 3.Katch-McArdle: The "Body Recomposition" formula. If you know your body fat percentage, this is the most accurate model as it focuses on Lean Body Mass (LBM), making it ideal for athletes and bodybuilders.

Understanding Activity Multipliers

The most common error in TDEE calculation is misjudging activity levels. Use these guidelines for the best results:

  • 1.Sedentary: Desk job, very little intentional exercise, less than 5,000 steps per day.
  • 2.Lightly Active: Walking 30 mins a day, 1-2 light gym sessions per week.
  • 3.Moderately Active: 3-5 productive workouts per week, active lifestyle (10k+ steps).
  • 4.Very Active: Daily intense training, physical job (construction, etc.).
  • 5.Extra Active: Professional athlete level training (2x per day) or extremely hard labor.

Technical Reference

Key Takeaways

Your health journey starts with understanding your baseline. Use the ToolsACE BMI Calculator to get accurate, actionable data about your body mass index today. By keeping your BMI within the healthy range, you significantly reduce the risk of chronic lifestyle diseases like heart disease and diabetes. Use these results as a compass to guide your nutrition, fitness, and overall wellness goals.

Frequently Asked Questions

What is the ?
If you've ever tried to manage your weight through diet and exercise, you've probably felt the frustration of not knowing exactly how many calories your body actually needs each day. That number — your Total Daily Energy Expenditure — is what our TDEE Calculator determines for you. By combining your Basal Metabolic Rate with your actual activity level, it gives you the most accurate possible estimate of your real-world daily calorie burn, which is the essential foundation for any effective nutrition plan.

TDEE is the sum of your BMR (the calories your body burns at rest) plus the additional calories burned through daily activities and exercise. Our calculator uses the Mifflin-St Jeor equation for BMR — the most accurate formula available — and then applies activity multipliers that range from sedentary (desk job, little exercise) to extremely active (intense training multiple times per day). Choosing the right activity level is critical: most people underestimate how active they truly are, which is one of the most common causes of stalled weight loss progress.

Knowing your TDEE takes the guesswork out of nutrition. Eat at your TDEE to maintain weight. Create a moderate deficit (500 calories) to lose about half a kilo per week. Eat above your TDEE to gain. It's simple in principle, and this calculator makes it precise in practice. Free, fast, works on any device.

Pro Tip: For more relevant tools in the health category, try our BMI Tool.

How is TDEE different from BMR?
BMR is calories burned at complete rest. TDEE adds the energy cost of all your daily activities on top of BMR.
Which activity level should I select?
Be honest about your actual activity. Most desk workers with occasional gym visits are 'lightly active', not sedentary.
How many calories should I eat to lose weight?
Subtract 500 from your TDEE for roughly 0.5kg per week of weight loss. Avoid deficits over 1000 calories without medical supervision.
How often should I recalculate my TDEE?
Every 4–8 weeks, or whenever your weight, activity level, or goals change significantly.
Does TDEE change as I lose weight?
Yes — as you lose weight, your BMR decreases, so your TDEE drops too. Recalculate periodically.
What formula does the calculator use?
Mifflin-St Jeor for BMR, multiplied by the Harris-Benedict activity factor for your activity level.
Is TDEE the same for everyone of the same weight?
No — age, gender, body composition, and activity level all cause significant differences in TDEE between individuals.
Is it free?
Yes, completely free.
Does it work on mobile?
Yes, fully mobile-friendly.

Author Spotlight

The ToolsACE Team - ToolsACE.io Team

The ToolsACE Team

Our nutrition tools team implements TDEE calculation using the Mifflin-St Jeor BMR formula (the most accurate equation for estimating resting energy expenditure) multiplied by Harris-Benedict activity factors for all five standard activity levels.

Mifflin-St Jeor BMR FormulaHarris-Benedict Activity MultipliersSoftware Engineering Team

Nutrition Disclaimer

The results provided by this tool are for informational purposes only and do not constitute medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition.