⚖️ BMI / BMR Calculator
Calculate your Body Mass Index, Basal Metabolic Rate, and daily recommended calories all at once.
cm
kg
years
What is BMI?
BMI (Body Mass Index) is calculated by dividing your weight (kg) by the square of your height (m). It's a widely used indicator to estimate body fat levels.
WHO BMI Classification
| Category | BMI Range |
|---|---|
| Underweight | Below 18.5 |
| Normal weight | 18.5 – 24.9 |
| Overweight | 25.0 – 29.9 |
| Obesity Class I | 30.0 – 34.9 |
| Obesity Class II | 35.0 – 39.9 |
| Obesity Class III | 40.0 and above |
What is BMR?
Basal Metabolic Rate (BMR) is the minimum energy your body needs to sustain vital functions. This calculator uses the Harris-Benedict equation:
- Male: 88.362 + (13.397 × weight kg) + (4.799 × height cm) - (5.677 × age)
- Female: 447.593 + (9.247 × weight kg) + (3.098 × height cm) - (4.330 × age)
Daily Calorie Recommendations
Total Daily Energy Expenditure (TDEE) is calculated by multiplying BMR by an activity factor:
- Sedentary (little/no exercise): BMR × 1.2
- Lightly active (1-3 days/week): BMR × 1.375
- Moderately active (3-5 days/week): BMR × 1.55
- Very active (6-7 days/week): BMR × 1.725
- Extra active (athlete level): BMR × 1.9