Calculators tool
Calculate Body Mass Index
Estimate BMI from height and weight using metric or imperial units.
Inputs
Results
Simple steps
How it works
- 01
Choose metric or imperial units.
- 02
Enter height and weight.
- 03
Review BMI and the broad adult category reference.
Good to know
Frequently asked questions
What does BMI measure?
BMI is weight relative to height; it is a screening measure, not a diagnosis.
Can I use pounds and inches?
Yes. Choose imperial units and enter weight in pounds and height in inches.
Are adult BMI ranges suitable for children?
No. Children and teens require age- and sex-specific percentiles from a health professional.
Does BMI show body composition?
No. BMI does not distinguish muscle, fat, bone, or individual health factors.
Is my measurement uploaded?
No. The calculation stays in your browser.