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Advanced Health & Fitness Calculators for Smart Decisions
TDEE Calculator
Calculate your Total Daily Energy Expenditure (TDEE) to understand how many calories you burn each day.
Daily Calorie Needs
What is TDEE?
TDEE stands for Total Daily Energy Expenditure. It represents the total number of calories your body burns in a day, including all activities from basic bodily functions to exercise.
Understanding TDEE: Your TDEE is composed of several components working together to determine how many calories you burn daily. Knowing your TDEE is crucial for weight management – whether you want to lose, maintain, or gain weight.
Components of TDEE:
- BMR (Basal Metabolic Rate): Calories burned at complete rest for basic bodily functions
- TEF (Thermic Effect of Food): Calories burned digesting and processing food
- NEAT (Non-Exercise Activity Thermogenesis): Calories burned through daily activities
- EAT (Exercise Activity Thermogenesis): Calories burned during formal exercise
How TDEE is Calculated
This calculator uses scientifically validated formulas to estimate your TDEE. You can choose between two different formulas:
Mifflin-St Jeor Equation
The Mifflin-St Jeor equation is considered the most accurate for estimating BMR in healthy individuals.
For Women: BMR = 10 × weight(kg) + 6.25 × height(cm) – 5 × age(y) – 161
Katch-McArdle Formula
The Katch-McArdle formula is more accurate for individuals who know their body fat percentage, as it accounts for lean body mass.
Lean Body Mass = Weight × (100 – Body Fat %) ÷ 100
Activity Multipliers
Once BMR is calculated, we multiply it by an activity factor to get your TDEE:
| Activity Level | Multiplier | Description |
|---|---|---|
| Sedentary | 1.2 | 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 |
| Extra Active | 1.9 | Very hard exercise & physical job |
Example Calculation
Let’s calculate the TDEE for a 30-year-old male who is 175 cm tall, weighs 75 kg, and is moderately active:
BMR = (10 × 75) + (6.25 × 175) – (5 × 30) + 5
BMR = 750 + 1093.75 – 150 + 5 = 1,698.75 calories
TDEE = BMR × Activity Multiplier
TDEE = 1,698.75 × 1.55 = 2,633 calories
This means this individual burns approximately 2,633 calories per day to maintain his current weight.
Frequently Asked Questions
BMR (Basal Metabolic Rate) is the number of calories your body needs to perform basic life-sustaining functions at complete rest. TDEE (Total Daily Energy Expenditure) includes BMR plus all the calories you burn through daily activities and exercise.
This calculator uses scientifically validated formulas (Mifflin-St Jeor and Katch-McArdle) that are widely accepted in the health and fitness industry. However, individual variations in metabolism, genetics, and other factors mean it provides an estimate rather than an exact measurement.
You should recalculate your TDEE whenever your weight changes significantly (more than 2-3 kg), your activity level changes, or every 3-6 months to account for natural metabolic changes.
Use Mifflin-St Jeor if you don’t know your body fat percentage. Use Katch-McArdle if you have a reasonably accurate measurement of your body fat percentage, as it can provide a more personalized estimate based on your body composition.