Broca Index (BI)

The Broca Index is an estimation of ideal body weight using a height measurement only. The Broca Index was developed by Paul Broca, a French surgeon who lived between 1824 and 1880. The Broca index is only a rough estimate and applies to the range of middle body sizes best. The BMI is a more common calculation of ideal body weight using both the height and weight measurements. See also the similar Ponderal Index.

equipment required: stadiometer for measuring height.

procedure: BI uses just a single measurement of height in cm. To get the recommended standard weight, you take away 100 from the height in cm. For example, a man 182 cm tall will have a standard weight of 82 kg. For females, the standard weight is 10% less. For example, a woman 182 cm tall will have a standard weight of 73.8 kg (0.9 x 82).

Standard Weight (kg) = Ht (cm) - 100

target population: this simple equation is not commonly used today, but is most accurate for those of moderate size.

advantages: a simple calculation from a single standard measurement.

disadvantages: this is a rough approximation, and not accurate for extremes of height.

other comments: Other simple measures of body composition, such as skinfolds measures, would be preferable if available.

references: Mémoires d’anthropologie. Paris, 1871/1877.

Share:

Similar Tests

Related Pages

Comments

Testing Extra

We have nearly 400 fitness tests listed, so it's not easy to choose the best one to use. You should consider the validity, reliability, costs and ease of use of each test. Use our guide to conducting, recording, and interpreting fitness tests. Any questions, please ask or search for your answer. To keep up with the latest in sport science and this website, subscribe to our newsletter. We are also on facebook and twitter.

How to Cite