Adult BMI Calculator
Estimate body mass index using metric or imperial units and understand the result in context.
BMI Calculator
Quick estimates using your height, weight, age, activity, or daily exercise.
These results are general estimates, not medical advice. Individual needs can vary. Consult a qualified healthcare professional before making health decisions.
What BMI can and cannot tell you
BMI compares weight with height and can be a useful adult screening estimate. It does not directly measure body fat, muscle mass, fitness, pregnancy health or an individual’s diagnosis.
How to use the result
- Use consistent, accurate height and weight measurements.
- Treat the number as an estimate, not a diagnosis.
- Discuss concerns or major lifestyle changes with a qualified healthcare professional.
Frequently asked questions
Is BMI suitable for children?
This calculator is intended for adults. Children and teenagers require age- and sex-specific growth references from qualified health services.
Is BMI medical advice?
No. The result is general educational information and must not replace professional medical advice, diagnosis or treatment.
Medical disclaimer: FitCalc is not a medical device and does not provide medical advice. Consult a qualified healthcare professional before changing diet, exercise, medication or treatment. For more tools, visit the FitCalc health calculators and wellness hub.