BMI Calculator

Q: Is BMI accurate for everyone?

No. Very muscular people can read as "overweight" despite low body fat, and older adults or some populations may be better served by other measures. Treat BMI as a rough screening tool.

Q: What's a healthy BMI range?

Standard adult categories place 18.5–24.9 as "normal weight." These ranges are general and don't apply to children, athletes, or people with certain conditions.

Q: Should I aim for a specific BMI?

Talk with a healthcare professional. Health is about far more than one number, and a clinician can look at the full picture.

Calculate your Body Mass Index

Body Mass Index (BMI) compares your weight to your height to give a single screening number. It's quick and widely used, but it has real limits — it can't tell muscle from fat or reflect overall health.

Unit System

Weight

lbs

Height (feet)

Height (inches)

Your BMI

24.4

Normal weight

BMI Categories

< 18.5

Underweight

18.5 – 24.9

Normal

25 – 29.9

Overweight

≥ 30

Obese

How to Use This Calculator

Choose metric or imperial units.
Enter your height.
Enter your weight.
Review your BMI and the category it falls in.

Why Use This Calculator?

Getting a quick screening number, not a diagnosis.
Tracking a general trend over time.
Seeing where you sit relative to standard ranges.

Real-World Examples

5'9", 160 lb

That works out to a BMI of about 23.6, which falls in the standard "normal weight" range.

What BMI actually measures

BMI is weight divided by height squared (with a conversion factor for imperial units). It captures size relative to height, but it doesn't directly measure body fat, fitness, or health.

Frequently Asked Questions

Is BMI accurate for everyone?

No. Very muscular people can read as "overweight" despite low body fat, and older adults or some populations may be better served by other measures. Treat BMI as a rough screening tool.

What's a healthy BMI range?

Standard adult categories place 18.5–24.9 as "normal weight." These ranges are general and don't apply to children, athletes, or people with certain conditions.

Should I aim for a specific BMI?

Talk with a healthcare professional. Health is about far more than one number, and a clinician can look at the full picture.

Important Disclaimer

BMI is a general screening estimate, not a measure of body fat or a diagnosis of any condition. It is not medical advice. For guidance about your weight or health, consult a qualified healthcare professional.

Privacy

Your height and weight stay in your browser; nothing is sent or stored.

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