Question 1

What is the difference between BMR and TDEE?

Accepted Answer

BMR (Basal Metabolic Rate) is the number of calories your body burns at rest to maintain basic functions like breathing and circulation. TDEE (Total Daily Energy Expenditure) is your BMR multiplied by your activity level, representing total daily calorie burn including exercise.

Question 2

Is this calculator accurate?

Accepted Answer

The Mifflin-St Jeor formula is one of the most accurate methods for estimating BMR and is widely used by nutritionists and fitness professionals. However, it is an estimate based on population averages. Individual metabolism varies based on genetics, hormones, diet quality, and lifestyle factors.

Question 3

How often should I recalculate my BMR?

Accepted Answer

Recalculate every time your age, weight, or activity level changes significantly. Since BMR changes with age and weight loss/gain, it is a good idea to recalculate every 2-3 months when following a fitness program.

Question 4

Should I eat exactly at my TDEE?

Accepted Answer

Your TDEE is a target range, not an exact number. Aim to be within 100-200 calories of your goal. Small variations day-to-day are normal and do not prevent progress. Consistency over weeks and months matters more than daily precision.

Question 5

Why am I not losing weight at my deficit?

Accepted Answer

Weight loss involves multiple factors: underestimated calorie intake, hormonal factors, water retention, insufficient protein, poor sleep, or high stress. If you are not seeing progress after 3-4 weeks, reduce calories by 200-300 more. Consult a healthcare professional if concerns persist.

Question 6

Does this calculator work for athletes?

Accepted Answer

This calculator works for most people, but highly trained athletes may have different metabolic rates. The activity multipliers are estimates; elite athletes should track actual results and adjust based on performance and body composition changes.

Question 7

Can I use this for muscle building?

Accepted Answer

Yes. To build muscle, eat at a surplus (add 300-500 calories) and combine with resistance training. The Weight Gain calculation provides a starting point. Progressive overload and adequate protein (0.8-1g per lb of body weight) are equally important.

Question 8

Is this calculator suitable for all ages?

Accepted Answer

This calculator is designed for adults. For children and teenagers, metabolic needs are different and should be assessed by a pediatrician or registered dietitian. During pregnancy and lactation, caloric needs also increase significantly.

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