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BMI Calculator
Body Mass Index from weight and height. Formula: weight (kg) ÷ height² (m²).
kg
cm
Definition
What is BMI
BMI (Body Mass Index) is a value calculated using your height and weight. It helps classify your body weight into underweight, normal, overweight, or obese.
Formula
BMI Formula
BMI = Weight (kg) ÷ Height (m²)
Example:
Weight = 70 kg
Height = 1.75 m
BMI = 70 ÷ (1.75 × 1.75) = 22.86
Weight = 70 kg
Height = 1.75 m
BMI = 70 ÷ (1.75 × 1.75) = 22.86
BMI Categories
BMI Categories
Below 18.5Underweight
18.5 – 24.9Normal Weight
25 – 29.9Overweight
30+Obese
BMI Prime
BMI Prime
BMI Prime = BMI ÷ 25
Short explanation: BMI Prime shows how close you are to the ideal BMI (25).
Example:
BMI = 22 → BMI Prime = 0.88
Example:
BMI = 22 → BMI Prime = 0.88
Benefits
Why BMI is Important
Helps understand if your weight is healthy
Indicates potential health risks
Useful for fitness and diet planning
Limitations
Limitations
BMI is a general guideline and may not be accurate for athletes, pregnant women, or individuals with high muscle mass.
Frequently Asked Questions
A BMI between 18.5 and 24.9 is considered healthy.
BMI is a general guideline and may not be accurate for everyone.
The formula is the same, but body composition differs.
BMI Prime shows how close your BMI is to the ideal value (25).