# K Value

Written by Jerry Ratzlaff on . Posted in Civil Engineering

K value, abbreviated as K, is the horizontal distance required to achieve a 1% change in the slope of the vertical curve.

## K Value formula

 $$\large{ K = \frac{ L }{ A } }$$

### Where:

 Units English Metric $$\large{ K }$$ = rate of vertical curvature $$\large{ft}$$ $$\large{m}$$ $$\large{ L }$$ = length of vertical curve $$\large{ft}$$ $$\large{m}$$ $$\large{ A }$$ = algebric difference in grade (%) $$\large{dimensionless}$$