# K-factor Constant

Written by Jerry Ratzlaff on . Posted in Structural Engineering

K-factor constant, abbreviated as K, a dimensionless number, is the distance from the inside bend to the neutral axis.  The neutral axis is where the material is neither compressed or stretched.  That distance is always less than 50% of the thickness of the material.

## K-factor constant Formula

 $$\large{ K = \frac{ t }{ T } }$$

### Where:

 Units English Metric $$\large{ K }$$ = K-factor constant $$\large{dimensionless\;constant}$$ $$\large{ T }$$  = material thickness $$\large{in}$$ $$\large{mm}$$ $$\large{ t }$$ = neutral axis $$\large{in}$$ $$\large{mm}$$