BMI (body mass index) = weight(kg) ÷ height(m)^2. It’s a quick, population-level screening metric for weight status.

What are BMI limitations?

BMI doesn’t separate fat from muscle and ignores fat distribution. Athletes, older adults, pregnancy, and children need better context or different tools.

What should I track alongside BMI?

Consider waist/WHR, body-fat estimate, weight trend, and training performance—not BMI alone.

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BMI

输入身高和体重，计算成人 BMI 分级（不适用于儿童与孕期）。

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Use together

WHR
(US Navy)
/ TDEE

Note: Children and teens require age/sex percentiles. Try our Kids BMI percentile calculator →

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BodyTypeCalc │ すべての体型に向けたインサイト — BMI (body mass index) calculator | BodyTypeCalc