Bmi And Calorie Calculator

BMI Formula:

\[ BMI = \frac{weight}{height^2} \]

Weight:

Height:

Age:

years

Gender:

Activity Level:

BMI:

TDEE (Total Daily Energy Expenditure):

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1. What is BMI and TDEE?

Body Mass Index (BMI) is a measure of body fat based on height and weight. Total Daily Energy Expenditure (TDEE) is an estimate of how many calories you burn per day when exercise is taken into account.

2. How Does the Calculator Work?

The calculator uses the following formulas:

\[ BMI = \frac{weight}{height^2} \]

For TDEE calculation, we first calculate BMR (Basal Metabolic Rate) using the Mifflin-St Jeor Equation:

\[ \text{Men: } BMR = 88.362 + (13.397 \times weight) + (4.799 \times height) - (5.677 \times age) \] \[ \text{Women: } BMR = 447.593 + (9.247 \times weight) + (3.098 \times height) - (4.330 \times age) \]

Then TDEE is calculated by multiplying BMR by an activity factor:

Sedentary (little or no exercise): BMR × 1.2
Lightly active (light exercise 1-3 days/week): BMR × 1.375
Moderately active (moderate exercise 3-5 days/week): BMR × 1.55
Very active (hard exercise 6-7 days a week): BMR × 1.725
Extra active (very hard exercise & physical job): BMR × 1.9

3. Importance of BMI and Calorie Calculation

Details: BMI helps categorize weight status and assess health risks associated with different weight ranges. TDEE calculation is essential for weight management, whether your goal is weight loss, maintenance, or gain.

4. Using the Calculator

Tips: Enter weight in kilograms, height in meters, age in years, select gender and activity level. All values must be valid (weight > 0, height > 0, age between 1-120).

5. Frequently Asked Questions (FAQ)

Q1: What is a healthy BMI range?
A: For adults, a BMI between 18.5 and 24.9 is considered healthy. Below 18.5 is underweight, 25-29.9 is overweight, and 30 or above is obese.

Q2: How accurate is TDEE calculation?
A: TDEE calculators provide estimates. Individual variations in metabolism, body composition, and exact activity levels can affect actual calorie needs.

Q3: Should I use BMI if I'm athletic?
A: BMI may overestimate body fat in athletes and others with high muscle mass, as it doesn't distinguish between muscle and fat.

Q4: How often should I recalculate my TDEE?
A: Recalculate when your weight changes significantly (±5kg) or when your activity level changes substantially.

Q5: Can I use this for weight loss planning?
A: Yes, creating a calorie deficit of 500-1000 calories per day from your TDEE typically results in safe weight loss of 0.5-1kg per week.