Enter the Cobb angle into the calculator to estimate height loss due to scoliosis using a published regression equation. If you also enter measured height, the calculator can estimate a “corrected height” by adding the estimated loss back.

Scoliosis Height-Loss Calculator

Enter a Cobb angle to estimate height loss. Optionally enter measured height to estimate corrected height. (You may also enter height loss to estimate an approximate Cobb angle.)

Disclaimer: Educational estimate only; not medical advice or a diagnosis. Cobb angle should be measured by a trained clinician from imaging. Discuss results with a qualified healthcare professional.

Scoliosis Height Loss Formula

The formula used to estimate height loss due to scoliosis is based on the Cobb angle (in degrees). Measured height is optional and is only used to estimate a “corrected height” by adding the estimated loss back. For background on this regression model and its intended use, consult peer-reviewed scoliosis/orthopedic literature.

HL (cm) = [0.6 × (CA – 30) + 2.6] ÷ 10

Variables:

  • HL is the estimated height loss (cm)
  • CA is the Cobb angle (degrees)

What is Scoliosis Height Loss?

Scoliosis height loss refers to the reduction in a person’s measured height due to curvature of the spine. The Cobb angle is a standard measure of curvature severity and can be used in research-based equations to estimate how much height may be “lost” from spinal curvature. This can help with general understanding and support discussions with a clinician.

How to Calculate Scoliosis Height Loss?

The following steps outline how to estimate the Scoliosis Height Loss.

  1. First, determine the Cobb angle (CA) in degrees.
  2. Next, use the equation: HL (cm) = [0.6 × (CA – 30) + 2.6] ÷ 10.
  3. If you want an estimated corrected height, add the estimated height loss (HL) to the measured height.
  4. Finally, convert the result into your preferred unit if needed.
  5. After inserting the variables and calculating the result, check your answer with the calculator above.

Example Problem : 

Use the following variables as an example problem to test your knowledge.

Cobb angle (CA) = 40 degrees

Measured height = 170 cm

Estimated height loss (HL) ≈ 0.86 cm

Estimated corrected height ≈ 170.86 cm