1. What is BMI?

Body Mass Index (BMI) is a simple calculation using a person's height and weight. The formula is BMI = kg/m² where kg is a person's weight in kilograms and m² is their height in meters squared.

2. How BMI Relates to Calorie Intake

BMI can help estimate your Total Daily Energy Expenditure (TDEE), which determines how many calories you should consume to maintain, lose, or gain weight.

Where BMR (Basal Metabolic Rate) can be estimated using formulas like Mifflin-St Jeor that incorporate weight, height, age, and gender.

3. BMI Categories

Standard BMI Categories:

• Underweight: BMI less than 18.5
• Normal weight: BMI 18.5 to 24.9
• Overweight: BMI 25 to 29.9
• Obese: BMI 30 or greater

4. Using the Calculator

Instructions: Enter your weight in kilograms and height in meters. The calculator will compute your BMI and indicate your weight category.

5. Frequently Asked Questions (FAQ)

Q1: Is BMI accurate for everyone?
A: BMI is a screening tool but doesn't account for muscle mass, bone density, or fat distribution. Athletes may have high BMI without excess fat.

Q2: How does BMI relate to calorie needs?
A: Higher BMI generally indicates higher calorie needs, but individual factors like activity level and metabolism are also important.

Q3: What's the best way to measure height and weight?
A: Measure weight in the morning after using the bathroom, and height without shoes against a flat wall.

Q4: Should BMI be interpreted differently for athletes?
A: Yes, athletes with high muscle mass may have high BMI without health risks. Body fat percentage may be more meaningful.

Q5: How often should I check my BMI?
A: For most adults, checking every few months is sufficient unless you're actively trying to change your weight.