Example calculation

BMI for 175 cm and 45 kg (5'9" / 99 lb)

This example calculates BMI for someone 175 cm (5'9") tall weighing 45 kg (99 lb), and shows where it falls on the standard WHO/CDC BMI category scale.

Inputs used in this example

Weight (kg)45

Height (cm)175

Estimated result

BMI

14.69

CategoryUnderweight

What this scenario tells you

For someone 175 cm tall weighing 45 kg (99 lb), the BMI works out to about 14.7, which falls into the underweight range under WHO/CDC guidelines. That's about 50 lb below the midpoint of the normal range (BMI 22 = 149 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

Open calculator Understand the calculation See how to use it

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.

BMI for 170 cm and 75 kg (5'7" / 165 lb)BMI for 170 cm and 80 kg (5'7" / 176 lb)BMI for 170 cm and 85 kg (5'7" / 187 lb)BMI for 170 cm and 90 kg (5'7" / 198 lb)BMI for 175 cm and 50 kg (5'9" / 110 lb)BMI for 175 cm and 55 kg (5'9" / 121 lb)BMI for 175 cm and 60 kg (5'9" / 132 lb)BMI for 175 cm and 65 kg (5'9" / 143 lb)