Calculate body mass index.
BMI gives you a quick height-to-weight screening metric. It is broad, but it can still be a useful starting checkpoint.
Nutrition & Weight Loss
BMI Calculator
Use this BMI calculator to estimate body mass index from height and weight with either metric or imperial units.
How it works
How to use the bmi calculator
BMI Calculator is intended for regular users who want a simple general health checkpoint before moving to more detailed body composition tools. Use it to get a quick size-to-height screening metric that is easy to compare over time.
Enter height and weight using the unit system you already track with. The calculator returns a BMI estimate.
BMI does not directly measure muscle mass, fat distribution, or athletic body composition. Use BMI as a broad screen only, then pair it with body fat, waist measurements, performance, and how you actually look and feel.
FAQ
Common questions about this calculator.
Use these quick answers as a starting point, then compare the result to your real-world progress.
What does the bmi calculator tell me?
Enter height and weight using the unit system you already track with. The result is a BMI estimate.
How accurate is the bmi calculator?
BMI does not directly measure muscle mass, fat distribution, or athletic body composition.
What should I do after I get my result?
Use BMI as a broad screen only, then pair it with body fat, waist measurements, performance, and how you actually look and feel.
Who is this calculator best for?
This calculator is intended for regular users who want a simple general health checkpoint before moving to more detailed body composition tools.
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