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Adult BMI calculator

Calculate adult BMI in metric or US units, compare reference ranges, and see BMI Prime and ponderal index.

Get started

  1. Use the example values or enter your own measurements.
  2. Calculate, then copy the result or download the available details.

Example

Input

70 kg, 175 cm

Expected result

BMI ≈22.86 kg/m²

Try it

Good to know

The calculation runs in your browser. Use consistent units in fields with no explicit unit.

Calculation method

BMI = kg ÷ m². Reference ranges are the CDC adult screening categories for ages 20 and above. BMI Prime divides BMI by 25. Ponderal index = kg ÷ m³.

BMI⁡=mkghm2\operatorname{BMI}=\frac{m_{\mathrm{kg}}}{h_{\mathrm{m}}^2}

Calculation mode

Metric
  • Age
  • Weight · kg
  • Height · cm
US customary
  • Age
  • Weight · lb
  • Height in feet · ft
  • Additional inches · in