BMI Comparison Calculator

Compare your BMI, BMR, and TDEE across different metrics and categories.

Your Results

BMI: 24.2

BMR

1618 kcal

TDEE

2224 kcal

Macro Split (Maintenance)

BMI Category Comparison

Your Results

MetricValue
BMI24.2
BMR (kcal/day)1618
TDEE (kcal/day)2224
Min Healthy Weight (kg)53.5
Max Healthy Weight (kg)72.0
Weight to Lose/Gain (kg)0

Understanding BMI, BMR, and TDEE

Body Mass Index (BMI) is a widely used screening tool that categorizes individuals based on their weight-to-height ratio. While BMI does not directly measure body fat, it provides a useful population-level indicator of weight-related health risks. Basal Metabolic Rate (BMR) represents the number of calories your body needs at complete rest, accounting for approximately 60-75% of daily calorie expenditure. The Mifflin-St Jeor equation is considered the most accurate BMR formula for most adults. Total Daily Energy Expenditure (TDEE) builds on BMR by factoring in physical activity level. Together, these three metrics form the foundation of any weight management strategy.

Practical Example

Scenario: A 35-year-old female, 165 cm, 72 kg, moderately active.

Step 1: BMI = 72 / (1.65 x 1.65) = 26.4 (Overweight)

Step 2: BMR (Mifflin) = 10 x 72 + 6.25 x 165 - 5 x 35 - 161 = 1,426 kcal

Step 3: TDEE = 1,426 x 1.55 = 2,210 kcal/day

Preguntas Frecuentes

What is a healthy BMI range?

A BMI between 18.5 and 24.9 is generally considered healthy for most adults.

How accurate is BMI?

BMI is a useful screening tool but may overestimate body fat in athletes and underestimate it in older adults.

What is the difference between BMR and TDEE?

BMR is calories burned at rest. TDEE includes BMR plus calories from daily activities and exercise.

Which BMR formula is most accurate?

Mifflin-St Jeor is most accurate for most people. Katch-McArdle is better for athletes who know their body fat percentage.

How many calories should I eat to lose weight?

A 500 kcal/day deficit below TDEE typically results in 0.5 kg/week loss. Never eat below BMR without medical supervision.

Disclaimer: This calculator provides estimates for informational purposes only. BMI is a screening tool, not a diagnostic measure.

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