Example calculation

BMI for 170 cm and 50 kg (5'7" / 110 lb)

This example calculates BMI for someone 170 cm (5'7") tall weighing 50 kg (110 lb), and shows where it falls on the standard WHO/CDC BMI category scale.

Inputs used in this example

Weight (kg)50

Height (cm)170

Estimated result

BMI

17.3

CategoryUnderweight

What this scenario tells you

For someone 170 cm tall weighing 50 kg (110 lb), the BMI works out to about 17.3, which falls into the underweight range under WHO/CDC guidelines. That's about 30 lb below the midpoint of the normal range (BMI 22 = 140 lb at this height). BMI is a quick screening number; pair it with waist circumference and body composition for a clearer picture.

Why this example matters

The result for bmi calculator uses the inputs shown above. Change one value at a time to see which assumption makes the biggest difference.

Before using the estimate to make a decision, check whether fees, units, timing, or other real-world conditions fall outside this calculation.

What to check next

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Explore nearby scenarios

Try a slightly different scenario to see how the result moves — useful for narrowing in on the values closest to your situation.

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