United States calculator
Evaluate a parabolic vertical curve at a station
Enter entering and exiting grades, curve length, PVC elevation and distance from PVC.
vertical profile
Project inputs
Vertical Curve Calculator results
How this Vertical Curve Calculator works
A standard equal-tangent parabolic equation computes elevation and grade at the selected station.
Important: Design sight distance and drainage require applicable highway standards and engineering review.
What assumptions should I verify?
Check every entered quantity, unit, rate and rule against the current U.S. source that applies to your project. The calculator does not silently substitute worldwide conventions.
Is information sent anywhere?
No. Calculations run locally in the browser and the module contains no analytics, remote requests or stored personal data.