What is the difference between TDEE and BMR?

BMR (Basal Metabolic Rate) is the number of calories your body needs at complete rest — just to keep your organs functioning. TDEE (Total Daily Energy Expenditure) includes your BMR plus all the calories you burn through daily activity, exercise, and digesting food. Your TDEE is always higher than your BMR.

How many calories should I eat to lose weight?

To lose weight at a healthy rate of about 0.5 kg (1 lb) per week, eat 500 calories below your TDEE. For a slower, more sustainable approach, aim for a 250-calorie deficit. Never eat below your BMR for extended periods, as this can lead to muscle loss and metabolic adaptation.

How accurate is the Mifflin-St Jeor equation?

The Mifflin-St Jeor equation is considered the most accurate predictive formula for estimating BMR, with an accuracy of about 80% within 10% of measured values. However, individual variation exists due to genetics, body composition, and hormonal factors. Use this as a starting point and adjust based on your results over 2–4 weeks.

How often should I recalculate my TDEE?

Recalculate your TDEE every time your weight changes by 5 kg (10 lbs), when you significantly change your activity level, or roughly every 3–4 months. As you lose weight, your TDEE decreases because your body requires less energy to maintain a smaller frame.

Can I build muscle and lose fat at the same time?

Body recomposition (simultaneous fat loss and muscle gain) is possible, especially for beginners, those returning to training after a break, or people with higher body fat. Eat at a slight deficit (200–300 kcal below TDEE), keep protein high (2 g per kg), and follow a progressive strength training program.

Why am I not losing weight even in a calorie deficit?

Common reasons include underestimating food intake (most people undercount by 20–50%), metabolic adaptation from prolonged dieting, water retention from stress or high sodium, and overestimating exercise calories burned. Try tracking food more precisely for two weeks, and consider a diet break if you have been in a deficit for more than 12 weeks.

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How We Calculate Your TDEE

We use the Mifflin-St Jeor equation, considered the most accurate formula for estimating calorie needs:

TDEE = BMR x Activity Multiplier

Calculate your BMR

Your Basal Metabolic Rate (BMR) is the number of calories your body burns at rest just to keep you alive — breathing, circulating blood, and maintaining organ function. The Mifflin-St Jeor formula calculates BMR using your weight, height, age, and biological sex. For men: (10 x weight in kg) + (6.25 x height in cm) - (5 x age) + 5. For women: the same formula minus 161 instead of plus 5.

Apply your activity level

Your BMR only accounts for resting metabolism. To get your TDEE, we multiply by an activity factor: sedentary (x1.2), lightly active (x1.375), moderately active (x1.55), very active (x1.725), or extremely active (x1.9). This accounts for all the calories you burn through daily movement, exercise, and non-exercise activity thermogenesis (NEAT).

Adjust for your goal

To lose weight, you need a calorie deficit — eating fewer calories than your TDEE. A 500 kcal daily deficit leads to roughly 0.5 kg (1 lb) of fat loss per week. To gain muscle, you need a surplus. We provide five goal-based targets so you can choose the approach that fits your lifestyle and timeline.

Why Knowing Your TDEE Matters

Your Total Daily Energy Expenditure is the total number of calories your body burns in a day. Understanding this number is the foundation of any successful nutrition plan — whether your goal is fat loss, muscle gain, or simply maintaining a healthy weight.

Key Benefits of Knowing Your TDEE

Sustainable weight loss — a moderate calorie deficit based on your TDEE prevents crash dieting and muscle loss
Effective muscle building — knowing your surplus target helps you gain lean mass without excessive fat
Optimized energy — eating the right amount of calories keeps your energy levels stable throughout the day
Better workout performance — fueling your body properly means stronger lifts and faster recovery
Metabolic awareness — understanding your BMR helps you avoid eating too little, which can slow your metabolism
Easier meal planning — a clear calorie target makes it simple to structure your meals and macros
Break through plateaus — recalculating your TDEE as your body changes helps you stay on track
Healthier relationship with food — numbers replace guesswork, reducing anxiety around eating

Practical Tips for Managing Your Calorie Intake

1Track your food for at least one week to understand your current intake — awareness alone often leads to better choices
2Prioritize protein at every meal (1.6–2.2 g per kg of body weight) — it supports muscle, boosts satiety, and has a higher thermic effect
3Make gradual adjustments — cut or add 200–300 kcal at a time and observe your body for 2 weeks before changing again
4Eat plenty of fiber-rich foods — vegetables, fruits, legumes, and whole grains keep you full on fewer calories
5Prioritize sleep — poor sleep increases hunger hormones (ghrelin) and reduces willpower, making overeating more likely
6Increase your daily steps to 8,000–10,000 — walking is the easiest way to boost your TDEE without added fatigue
7Drink water before meals — studies show this can reduce calorie intake by 75–90 calories per meal
8Focus on consistency over perfection — hitting your calorie target 80% of the time is more effective than being perfect for 3 days then binging

Common Calorie and Metabolism Myths Debunked

"Eating less than 1,200 calories is the fastest way to lose weight"

Very low-calorie diets cause your body to adapt by slowing metabolism, increasing hunger hormones, and breaking down muscle for energy. A moderate deficit of 300–500 kcal below your TDEE is far more sustainable and preserves muscle mass. Most adults should not eat below their BMR.

"Your metabolism is fixed — some people are just lucky"

While genetics influence BMR by roughly 5–10%, the biggest factors are your weight, muscle mass, activity level, and age — all of which you can influence. Building muscle through strength training is one of the most effective ways to raise your resting metabolic rate.

"Eating at night makes you gain weight"

Weight gain is determined by total calorie intake versus expenditure, not meal timing. A 2013 study in the British Journal of Nutrition found no link between eating late and weight gain when total calories were controlled. What matters is your overall daily intake relative to your TDEE.

"Cardio is the best way to burn calories"

While cardio burns calories during the session, strength training builds muscle that increases your BMR permanently. A kilogram of muscle burns about 13 kcal per day at rest versus 4.5 kcal for fat. The most effective approach combines both resistance training and cardiovascular exercise.

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Frequently Asked Questions

What is the difference between TDEE and BMR?: BMR (Basal Metabolic Rate) is the number of calories your body needs at complete rest — just to keep your organs functioning. TDEE (Total Daily Energy Expenditure) includes your BMR plus all the calories you burn through daily activity, exercise, and digesting food. Your TDEE is always higher than your BMR.
How many calories should I eat to lose weight?: To lose weight at a healthy rate of about 0.5 kg (1 lb) per week, eat 500 calories below your TDEE. For a slower, more sustainable approach, aim for a 250-calorie deficit. Never eat below your BMR for extended periods, as this can lead to muscle loss and metabolic adaptation.
How accurate is the Mifflin-St Jeor equation?: The Mifflin-St Jeor equation is considered the most accurate predictive formula for estimating BMR, with an accuracy of about 80% within 10% of measured values. However, individual variation exists due to genetics, body composition, and hormonal factors. Use this as a starting point and adjust based on your results over 2–4 weeks.
How often should I recalculate my TDEE?: Recalculate your TDEE every time your weight changes by 5 kg (10 lbs), when you significantly change your activity level, or roughly every 3–4 months. As you lose weight, your TDEE decreases because your body requires less energy to maintain a smaller frame.
Can I build muscle and lose fat at the same time?: Body recomposition (simultaneous fat loss and muscle gain) is possible, especially for beginners, those returning to training after a break, or people with higher body fat. Eat at a slight deficit (200–300 kcal below TDEE), keep protein high (2 g per kg), and follow a progressive strength training program.
Why am I not losing weight even in a calorie deficit?: Common reasons include underestimating food intake (most people undercount by 20–50%), metabolic adaptation from prolonged dieting, water retention from stress or high sodium, and overestimating exercise calories burned. Try tracking food more precisely for two weeks, and consider a diet break if you have been in a deficit for more than 12 weeks.