# Rate of change of grade on roadways

Calculate the Rate of change of grade on roadways with our free online tool using the input parameters: Length of Curve, Initial Grade, Final Grade

Use this online calculator to determine the rate of change of grade for a vertical curve in roadway design.

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Number of calculations

The variables used in the formula are:

`r`

– Rate of change of grade

`g`

– Initial roadway grade_{1}

`g`

– Final roadway grade_{2}

`L`

– Length of the curve

Calculating the rate of change of grade for roadways is made simpler and more accessible with online, free vertical curve calculators.