Body Mass Index (BMI) Calculator
Calculate body mass index from height and weight.
Health and wellness
Health
Inputs
BMI Calculator
Results update as you type.
Live result
BMI
22.86
Estimated body mass index.
Healthy range low
56.7
Healthy range high
76.3
Scenario compare
Save scenario A, change a few inputs, then save scenario B.
Scenario A
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Scenario B
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Quick check
Change one or two inputs to compare a second scenario before using the number.
Need more detail?
Formula, examples, and FAQ stay tucked away until you need them.
FXFormula ExplanationThe core logic behind the numbers on this page.+
The BMI formula is straightforward: weight in kilograms divided by height in meters squared. This calculation provides a quick and easy way to assess your weight status. BMI is a widely used metric to categorize individuals as underweight, normal weight, overweight, or obese. However, it does not account for body composition, age, or pregnancy.
USEHow to UseA short path from input to result.+
- Enter your weight in kilograms.
- Enter your height in centimeters.
- Review the BMI result and healthy-weight range.
EXExamplesReference scenarios to sanity-check your inputs.+
Example: 70 kg and 175 cm gives a BMI of 22.86.
FAQFAQCommon edge cases and quick clarifications.+
What is BMI used for?
BMI is a widely used metric to assess weight status and categorize individuals as underweight, normal weight, overweight, or obese.
How accurate is BMI?
BMI is a screening tool and not a definitive measure. It may not accurately reflect body composition, muscle mass, or other health factors.
Can I use BMI during pregnancy?
BMI is not recommended for pregnant individuals, as it does not account for the changes in body composition during pregnancy.
Is BMI suitable for athletes?
BMI may not be the most accurate measure for athletes, as it does not account for muscle mass and body composition.