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BMI stands for Body Mass Index. It is a simple, widely used tool to assess whether a person has a healthy body weight for their height.

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🔢 How is BMI Calculated?

BMI=Weight (kg)Height (m)2BMI=Height (m)2Weight (kg)​

Or, if you’re using pounds and inches:BMI=Weight (lb)×703Height (in)2BMI=Height (in)2Weight (lb)×703​

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📊 BMI Categories (for Adults)

BMI Range	Category
Below 18.5	Underweight
18.5–24.9	Normal weight
25–29.9	Overweight
30 and above	Obese

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❗ Why Is BMI Important?

• Quick screening tool for potential health issues.
• Helps doctors assess the risk of diseases such as:
  • Heart disease
  • Type 2 diabetes
  • High blood pressure
  • Sleep apnea

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Height	Underweight<br>(<18.5)	Normal<br>(18.5–24.9)	Overweight<br>(25–29.9)	Obese<br>(≥30)
4’10”	< 91 lbs	91–118 lbs	119–142 lbs	143+ lbs
5’0″	< 97 lbs	97–127 lbs	128–153 lbs	154+ lbs
5’2″	< 104 lbs	104–136 lbs	137–164 lbs	165+ lbs
5’4″	< 110 lbs	110–145 lbs	146–175 lbs	176+ lbs
5’6″	< 117 lbs	117–154 lbs	155–186 lbs	187+ lbs
5’8″	< 123 lbs	123–163 lbs	164–196 lbs	197+ lbs
5’10”	< 129 lbs	129–173 lbs	174–208 lbs	209+ lbs
6’0″	< 136 lbs	136–183 lbs	184–220 lbs	221+ lbs
6’2″	< 143 lbs	143–193 lbs	194–232 lbs	233+ lbs

⚠️ Limitations of BMI

• Does not measure body fat directly
• May misclassify muscular individuals (e.g., athletes)
• Doesn’t account for age, sex, or muscle-to-fat ratio
• Not suitable for children without age-adjusted percentiles

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🩺 Bottom Line

BMI is a useful general guideline, but it should be interpreted alongside other measurements like waist circumference, body fat percentage, and overall health assessments.