BMI Calculator

Body Mass Index in metric or imperial.

Height (cm)

Weight (kg)

23.5

Your BMI

Normal weight

How to use the BMI Calculator

How is BMI calculated?

BMI = weight (kg) ÷ height (m)². In imperial units it is 703 × weight (lb) ÷ height (in)².

What are the BMI categories?

Under 18.5 is underweight, 18.5–24.9 normal, 25–29.9 overweight, and 30+ obese. BMI is a general guide, not a diagnosis.

Maintenance calories, BMR and macro split.

Exact age in years, months and days.

Percent of a number, change and more.

Days, weeks and months between two dates.

Daily calories to lose, maintain or gain weight.