BMR & BMI Calculator
Calculate Body Mass Index and Basal Metabolic Rate with calorie goals and activity levels.
Knowledge Base
The BMR & BMI Calculator computes your Body Mass Index and Basal Metabolic Rate using the Mifflin-St Jeor equation. It provides BMI category classification, daily calorie goals for weight management, and activity-adjusted TDEE.
- 1Enter your gender, age, weight, and height.
- 2Select your activity level.
- 3View your BMI category, BMR, and personalized daily calorie goals.
Your health and body metrics are processed locally in the browser and never sent to any server. Your personal health information remains completely private, and all calculations are instant with zero data transmission.
What equation is used for BMR calculation?
The calculator uses the Mifflin-St Jeor equation, which is considered the most accurate BMR formula. For men: BMR = 10 × weight(kg) + 6.25 × height(cm) - 5 × age - 161 + 166. For women, the constant differs slightly.
What are the BMI categories?
BMI categories are: Underweight (<18.5), Normal weight (18.5-24.9), Overweight (25-29.9), and Obese (≥30). These ranges are based on WHO guidelines.