BMI Calculator
Body Mass Index with WHO classification ranges and limitations note for athletic populations.
Inputs
Fill in the inputs and press Calculate to see your science-backed results.
How to use BMI Calculator
Body Mass Index with WHO classification ranges and limitations note for athletic populations.
Choose measurements that describe your actual session or situation, confirm the units, then calculate. Read the result alongside its assumptions and use the tool again when your inputs change.
Inputs explained
Weight (kg)
Enter a measured or estimated value (minimum 30) (maximum 300), using the unit indicated in the field label.
Height (cm)
Enter a measured or estimated value (minimum 120) (maximum 220), using the unit indicated in the field label.
Age
Enter a measured or estimated value (minimum 2) (maximum 100), using the unit indicated in the field label.
Sex
Choose the option that matches your context; available options include Male, Female.
How to interpret the output
Body-composition measures depend on method and hydration. Look for trends instead of interpreting a single reading in isolation.
Repeat measurements using similar conditions when monitoring trends. Numerical predictions can vary with input accuracy, measurement method and individual circumstances.
Limitations and responsible use
BMI doesn't distinguish muscle from fat. Athletes with high muscle mass may show 'overweight' BMI without health risk.
Read the full disclaimerFrequently asked questions
What does the BMI Calculator estimate?
Body Mass Index with WHO classification ranges and limitations note for athletic populations.
Which information do I need for this bodycomp tool?
Provide Weight (kg), Height (cm), Age, Sex. Use your own relevant measurements and the units indicated in each field.
How should I interpret the result?
Body-composition measures depend on method and hydration. Look for trends instead of interpreting a single reading in isolation. Compare results with your goals and other relevant observations rather than using a single output to make a major decision.
Disclaimer: BMI doesn't distinguish muscle from fat. Athletes with high muscle mass may show 'overweight' BMI without health risk. Read the medical disclaimer.
Related Resources