BMI (Body Mass Index) Calculator

Use this bmi (body mass index) calculator for an approximate adult fitness calculation. Choose US units for pounds, inches or yards, or switch to metric. Results are estimates, not medical or training prescriptions.

Your Numbers

Body Weightkg

Heightcm

Results

Body Mass Index—

Adult BMI screening category—

Healthy Range (min)—

Healthy Range (max)—

Input check—

Results update live as you type. Estimates only — not financial, tax, or investment advice.

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The Formula

BMI = Weight (kg) ÷ Height (m)²

Understanding the BMI (Body Mass Index) Calculator

Worked example: At 80 kg (176.4 lb) and 180 cm (70.9 in), BMI is 24.69. The calculation is weight in kilograms divided by height in meters squared.

Adult BMI categories here are for ages 20 and older. BMI is a screening measure, not a diagnosis; it does not distinguish muscle from fat and is not a personal goal-weight prescription.

Reference

CDC: adult BMI screening and limitations

This reference explains mortgage cost terminology. This reference provides context and limitations; it does not validate every formula on this page.

Frequently Asked Questions

How is the result calculated?

BMI = Weight (kg) ÷ Height (m)²

What should I know about this estimate?

Adult BMI categories here are for ages 20 and older. BMI is a screening measure, not a diagnosis; it does not distinguish muscle from fat and is not a personal goal-weight prescription.