BMI & Daily Calorie Needs Calculator
Calculate Body Mass Index (BMI), healthy weight targets, and Basal Metabolic Rate (BMR) daily calories.
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Last Reviewed: August 2026
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22.86BMI Score
Normal WeightWeight Category
2,280 kcalDaily Maintenance Calories
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Body Mass Index (WHO Standards) & Basal Metabolic Energy Expenditure
Body Mass Index (BMI) is a standardized screening metric defined by the World Health Organization (WHO) to evaluate weight categories in adults. Our calculator pairs BMI with the Mifflin-St Jeor equation to compute Basal Metabolic Rate (BMR) and Total Daily Energy Expenditure (TDEE).
WHO BMI Classifications
- Underweight: BMI < 18.5
- Normal Weight: BMI 18.5 – 24.9
- Overweight: BMI 25.0 – 29.9
- Obesity Class I & II: BMI 30.0+
The Mifflin-St Jeor BMR Equation
- Men:
BMR = 10 * weight(kg) + 6.25 * height(cm) - 5 * age(years) + 5 - Women:
BMR = 10 * weight(kg) + 6.25 * height(cm) - 5 * age(years) - 161 - Maintenance Calories (TDEE):
TDEE = BMR * Activity Factor
Frequently Asked Questions (FAQ)
Because BMI calculates weight relative to height without separating lean muscle mass from adipose fat tissue, highly muscular athletes may register as overweight despite low body fat.
One pound of body fat equals approximately 3,500 kcal. A daily deficit of 500 kcal equates to about 1 pound of weight loss per week.
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