BrainyCalculators
Login
Advertisement

🏃 TDEE Calculator

Calculate Total Daily Energy Expenditure — BMR plus activity. Get maintenance, weight-loss, and muscle-gain calorie targets from your lifestyle and exercise level.

Total Daily Energy Expenditure — Maintenance Calories

BrainyCalculators editorial insight — unique to this tool

TDEE = BMR × activity factor (1.2 sedentary to 1.9 very active). A 1,700 BMR office worker at 1.375 ≈ 2,340 kcal maintenance. Fat loss typically targets 300–500 kcal deficit; bulk adds 200–300 surplus. Indian diet planning often starts here before splitting protein/carbs in Macro calculator.

When to use this calculator

Use to find maintenance or cut/bulk calorie targets. For resting-only burn, use BMR.

Need resting metabolism without activity?

This page estimates total daily burn with activity multipliers. For basal metabolic rate at complete rest and formula comparison, use the BMR Calculator →

What is TDEE (Total Daily Calorie Burn)?

Total Daily Energy Expenditure (TDEE) is every calorie you burn in a day: basal metabolism, digestion, movement, and exercise. TDEE = BMR × activity factor. Eating at TDEE maintains weight; a sustained deficit below TDEE drives fat loss; a surplus above TDEE supports muscle gain.

This calculator estimates BMR via Mifflin-St Jeor, then applies your selected activity level — sedentary through very active — to produce maintenance calories and suggested deficit/surplus bands. It is the practical starting point for macro planning and diet periodisation.

If you only need resting metabolism without activity — for clinical reference, formula comparison, or understanding your physiological baseline — use the BMR Calculator. TDEE builds on BMR; BMR isolates rest-only burn.

Mifflin-St Jeor Formula

Male BMR: (10 × kg) + (6.25 × cm) − (5 × age) + 5
Female BMR: (10 × kg) + (6.25 × cm) − (5 × age) − 161
TDEE: BMR × Activity Multiplier

How to Use the TDEE Calculator

  1. 1
    Select Your Gender
    Choose male or female — the Mifflin-St Jeor formula uses different constants for each.
  2. 2
    Enter Your Measurements
    Enter your age, height, and weight. Switch between metric (kg/cm) and imperial (lbs/ft) as needed.
  3. 3
    Choose Activity Level
    Select the activity level that best matches your typical weekly exercise and lifestyle.
  4. 4
    Review Your Calorie Goals
    See your BMR, TDEE (maintenance calories), and targets for weight loss or gain at different rates.

Example Calculation

Female, 28 years old, 165 cm, 65 kg, moderately active (×1.55):

BMR = (10 × 65) + (6.25 × 165) − (5 × 28) − 161
BMR = 650 + 1,031.25 − 140 − 161 = 1,380 kcal
TDEE = 1,380 × 1.55 = 2,139 kcal/day
Weight loss target = 2,139 − 500 = 1,639 kcal/day

How the TDEE Calculator Works

Formula, assumptions, and calculation steps for this health tool.

Formula Used

TDEE = BMR * Activity Factor

Methodology

Health calculators use published screening formulas and common planning rules to estimate body, nutrition, pregnancy, or fitness metrics from user inputs.

Calculation Steps

  1. Enter the personal measurements requested by the tool.
  2. Convert height, weight, age, dates, or activity inputs to standard units.
  3. Apply the health or fitness formula for the selected metric.
  4. Show the estimate with practical ranges or interpretation where available.

Assumptions and Limits

  • Results are educational estimates, not diagnosis or medical advice.
  • Individual factors such as medication, pregnancy, and medical history can change interpretation.
  • Consult a clinician for personal health decisions.

Reference basis: Common public-health and sports-science screening formulas.

Frequently Asked Questions

TDEE (Total Daily Energy Expenditure) is the total number of calories you burn in a day, including your basal metabolic rate (BMR) and all physical activity. It represents your maintenance calorie level — eating at TDEE keeps your weight stable.

BMR (Basal Metabolic Rate) is the calories your body burns at complete rest — just to keep organs functioning. TDEE is BMR multiplied by an activity factor to account for exercise and daily movement. TDEE is always higher than BMR.

The Mifflin-St Jeor equation is considered the most accurate for most people, with studies showing roughly ±10% accuracy. Individual variation due to genetics, muscle mass, and hormones means real TDEE may differ. Track your weight over 2–3 weeks and adjust by ±100–200 kcal if needed.

Several factors can explain this: metabolic adaptation (your body reduces TDEE in a deficit), water retention masking fat loss, inaccurate calorie tracking, or over-estimating your activity level. Try re-measuring after 3–4 weeks and ensure you are tracking food accurately.

Real-World Applications

⚖️
Weight Loss Calorie Target Setting
The most scientifically grounded approach to weight loss is creating a calorie deficit below TDEE — typically 500 kcal/day below maintenance to produce approximately 0.5 kg (1 lb) of weight loss per week. The TDEE calculator provides the starting point: a person with a TDEE of 2,500 kcal/day targeting 0.5 kg/week loss should aim for approximately 2,000 kcal/day. Without knowing TDEE, calorie targets are arbitrary guesses.
🏋️
Muscle-Building Calorie Surplus Planning
Athletes and bodybuilders pursuing lean muscle gain ("clean bulk") aim to eat 10–20% above TDEE — enough of a surplus to support muscle protein synthesis without excessive fat gain. On a TDEE of 3,000 kcal, a 15% surplus is 3,450 kcal/day. The TDEE calculator informs the starting point for the surplus, which is then fine-tuned based on weekly weight gain (target 0.25–0.5 kg/week during a lean bulk).
🩺
Clinical Nutrition & Dietitian Practice
Registered dietitians and clinical nutritionists use TDEE estimates as the foundation for prescribed dietary plans — for hospital patients, eating disorder recovery, sports performance nutrition, and weight management. The Mifflin-St Jeor equation is the standard clinically validated formula; more precise indirect calorimetry measurements may be used for critical care patients or elite athletes where accuracy is essential.
🔬
Sports Performance Nutrition
Elite athletes in training have dramatically elevated TDEEs compared to sedentary individuals — Tour de France cyclists may burn 8,000–10,000 kcal/day during mountain stages; marathon runners training 100 miles/week may have TDEEs of 4,500–5,500 kcal/day. Accurately estimating TDEE is critical to ensuring adequate energy availability for performance, recovery, and avoiding relative energy deficiency in sport (RED-S).
📱
Fitness App Calorie Budget Configuration
Apps like MyFitnessPal, Cronometer, and Lose It! use TDEE estimates to set daily calorie goals for users. Understanding how these apps calculate TDEE — and the activity multiplier they assume — helps users verify whether the app-set goal is appropriate for their actual activity level, and adjust it when their exercise patterns change significantly.
👶
Pregnancy & Postpartum Energy Requirements
Pregnant women's energy requirements increase by approximately 300–450 kcal/day in the second and third trimesters to support foetal growth and maternal tissue changes. Breastfeeding adds approximately 500 kcal/day to TDEE. A TDEE calculator adapted for pregnancy and lactation — using appropriate body weight and activity adjustments — helps expecting and new mothers understand their increased energy needs without resorting to the oversimplified "eating for two" guideline.

Common Mistakes

1
Overestimating activity level and choosing too high an activity multiplier
The activity multiplier is the single largest source of TDEE estimation error. People consistently overestimate their physical activity level — someone who exercises 3 days per week for 30 minutes but sits at a desk the remaining 14+ hours per day is "lightly active" (×1.375), not "moderately active" (×1.55). Choosing an activity multiplier one level too high overstates TDEE by 200–300 kcal/day, explaining why calculated maintenance calories sometimes lead to weight gain rather than weight stability.
2
Using body weight instead of lean body mass for very overweight individuals
The Mifflin-St Jeor formula uses total body weight. For individuals with very high body fat percentages (>35%), this overestimates BMR because adipose tissue has much lower metabolic activity than lean mass. For obese individuals, using adjusted body weight (midpoint between current weight and ideal weight) or a lean mass-based formula (Katch-McArdle: BMR = 370 + 21.6 × LBM in kg) produces more accurate TDEE estimates.
3
Not adjusting TDEE as weight changes during a diet or bulk
TDEE is not static — it decreases as body weight decreases (both because the body is lighter and due to metabolic adaptation). A person who started dieting at 90 kg with a TDEE of 2,400 kcal will have a reduced TDEE when they reach 80 kg — perhaps 2,100–2,200 kcal. Continuing to eat at the original 1,900 kcal deficit target will produce a progressively smaller deficit and slower progress. Recalculate TDEE every 5–10 kg of weight change.
4
Treating TDEE as a daily fixed number rather than a weekly average
Daily calorie expenditure varies significantly — a rest day may burn 400 fewer calories than an intense training day. TDEE is better understood as a weekly average: a 2,400 kcal TDEE means approximately 16,800 kcal per week, not exactly 2,400 kcal every day. Trying to hit an exact daily target every day, including adjusting for individual workout days, over-complicates the process — weekly calorie balance is a sufficient planning unit for most body composition goals.
5
Expecting calculated TDEE to match actual TDEE without empirical verification
TDEE formulas are population averages; individual metabolic rates vary by 10–15% due to genetics, hormones, gut microbiome, and adaptive thermogenesis. The only way to determine your actual TDEE is empirically: eat at a calculated maintenance level for 2–4 weeks and observe body weight. If weight is stable, the calculation is accurate. If weight is changing, adjust calories until stability is achieved — that adjusted number is your actual TDEE.

TDEE Activity Multiplier Quick Reference

Activity Level Multiplier Description
Sedentary × 1.2 Desk job, little or no exercise
Lightly active × 1.375 Light exercise 1–3 days/week
Moderately active × 1.55 Moderate exercise 3–5 days/week
Very active × 1.725 Hard exercise 6–7 days/week
Extremely active × 1.9 Physical job + hard exercise daily

References

  1. Mifflin, M.D. et al. "A New Predictive Equation for Resting Energy Expenditure in Healthy Individuals." American Journal of Clinical Nutrition, 1990.
  2. Harris, J.A. and Benedict, F.G. "A Biometric Study of Human Basal Metabolism." PNAS, 1918.
  3. Katch, V.L. et al. Exercise Physiology: Nutrition, Energy, and Human Performance. Wolters Kluwer, 2015.
  4. Hall, K.D. et al. "Quantification of the Effect of Energy Imbalance on Bodyweight." The Lancet, 2011.
  5. Ainsworth, B.E. et al. "Compendium of Physical Activities." Medicine & Science in Sports & Exercise, 2011.

Related Calculators

Browse all Health calculators →
⚡ Health

BMR Calculator

Calculate your Basal Metabolic Rate — the calories your body burns at rest.

Calculate now
🔥 Health

Calorie Calculator

Calculate your daily calorie needs based on age, gender, height, weight, and activity level.

Calculate now
🥗 Health

Macro Calculator

Calculate your daily macronutrient targets — protein, carbs, and fat — for your goal.

Calculate now