Body Mass Index (BMI) Calculator ⚖️

Determine your BMI and its medical classification based on standard WHO guidelines for adults.

1. Select Units and Enter Data

Measurement Units:

Metric (kg, cm) Imperial (lb, ft/in)

Height ($\text{cm}$)

Weight ($\text{kg}$)

Height ($\text{ft}/\text{in}$)

Weight ($\text{lb}$)

The BMI calculation is the same globally, but the formula differs depending on the unit system used:

$$ \mathbf{\text{BMI}} = \frac{\text{Weight (kg)}}{\text{Height (m)}^2} = \frac{\text{Weight (kg)}}{\left(\frac{\text{Height (cm)}}{100}\right)^2} $$

$$ \mathbf{\text{BMI}} = \frac{\text{Weight (lb)}}{\text{Height (in)}^2} \times 703 $$

The resulting BMI score is always expressed in $\text{kg}/\text{m}^2$.