Estimate body mass index from weight in kilograms and height in centimeters.
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BMI is body mass in kilograms divided by height in meters squared. Convert centimeters to meters first: 70 kg and 175 cm gives 70 / 1.75² = 22.86 kg/m². The tool returns the numeric ratio, rather than a diagnosis or body-fat measurement.
Formula · Worked example · Units and assumptions · Questions and answers
BMI = weight (kg) ÷ height² (m²)70 kg and 175 cm gives 70 ÷ 1.75² = 22.86 BMI.
Entering 1.75 in the centimeter field, or treating a BMI number alone as an assessment of personal health.
Explanations updated . See the calculation methodology for precision and review details.
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Result: 22.86 kg/m²
The height field takes centimeters. The calculation converts 175 cm to 1.75 m before squaring, and the result is a screening ratio rather than a diagnosis.
Result: 27.78 kg/m²
Compare a different height and weight pair to see that height enters the formula as a square. These fictional measurements do not define a target weight or a treatment recommendation.
Body mass index is a screening ratio that compares weight with height. It does not directly measure body fat.
A BMI from 18.5 to 24.9 is commonly used as a general adult reference range.
No. BMI is only a screening estimate and should not replace advice from a qualified healthcare professional.
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