Introduction:

What Is TDEE?

TDEE (Total Daily Energy Expenditure) is the total number of calories your body burns in a full day. It includes:

• Calories burned at rest
• Calories burned during exercise
• Calories used for daily activities and digestion

In simple terms, your TDEE tells you how many calories you need per day to maintain your current body weight. Knowing your TDEE is essential if your goal is weight loss, weight maintenance, or weight gain.

---

How This TDEE Calculator Works?

This calculator uses the Mifflin–St Jeor equation, which is widely regarded as the most accurate formula for estimating calorie needs in healthy adults.

The calculation happens in two steps:

---

Formula Used in This TDEE Calculator

Step 1: Basal Metabolic Rate (BMR)

Your BMR is the number of calories your body needs to function at complete rest.

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

---

Step 2: Total Daily Energy Expenditure (TDEE)

After calculating BMR, the calculator applies an activity multiplier to estimate total daily calorie burn.

TDEE = BMR × Activity Level

The final result is rounded to the nearest whole number:

Final TDEE = Math.round(BMR × Activity Level)

---

Activity Level Multipliers Used

These are the exact activity multipliers used in the calculator code:

Activity Level	Multiplier
Sedentary (little or no exercise)	1.2
Lightly active (1–3 days/week)	1.375
Moderately active (3–5 days/week)	1.55
Very active (6–7 days/week)	1.725
Super active (physical job or athlete)	1.9

Choose the option that best matches your average weekly activity, not just your best days.

---

Why Knowing Your TDEE Is Important

Your TDEE is the foundation of calorie planning:

• To lose weight: eat fewer calories than your TDEE
• To maintain weight: eat roughly the same number of calories as your TDEE
• To gain weight or muscle: eat more calories than your TDEE

Without knowing your TDEE, calorie targets are guesswork and progress becomes unpredictable.

---

TDEE vs BMR – What’s the Difference?

BMR	Calories your body burns at complete rest
TDEE	Calories your body burns in an entire day

BMR is the base number.
TDEE is the practical number you should use for diet planning.

---

Is This TDEE Calculator Accurate?

This calculator provides a reliable calorie estimate for most people. However:

• Individual metabolism can vary
• Muscle mass, hormones, and genetics influence energy needs

Use your TDEE as a starting point, then adjust based on real-world results over 1–2 weeks.

---

How Often Should You Recalculate TDEE?

Recalculate your TDEE when:

• Your body weight changes noticeably
• Your activity level increases or decreases
• You switch goals (fat loss to muscle gain, or vice versa)

---

FAQs on TDEE Calculator

What is a normal TDEE value?

There is no single normal value. TDEE depends on your body size, age, gender, and activity level.

Can TDEE help with weight loss?

Yes. Weight loss requires eating fewer calories than your TDEE over time.

Is TDEE different for men and women?

Yes. Men typically have higher TDEE values due to higher muscle mass.

Should I eat exactly my TDEE every day?

Not necessarily. Small daily variations are normal and expected.

---

Final Thoughts

Your Total Daily Energy Expenditure is the most important calorie number you should know. It acts as the starting point for every nutrition and fitness goal. Use this TDEE calculator to understand your calorie needs, then build your plan using deficit, surplus, or macro-based tools for best results.