Horizontal Curve Calculator

Calculate horizontal curve elements for road and railway alignment.

Distance from center to edge of a circle (half the diameter).
ft
Enter the central angle (delta) value for this calculation.
degrees
Enter the pi station value for this calculation.

Results

Tangent Length (T):
Calculated tangent length (t) based on your inputs.
-ft
Curve Length (L):
Calculated curve length (l) based on your inputs.
-ft
External Distance (E):
Calculated distance.
-ft
Middle Ordinate (M):
Calculated middle ordinate (m) based on your inputs.
-ft
Long Chord (C):
Calculated long chord (c) based on your inputs.
-ft
PC Station:
Calculated pc station based on your inputs.
-
PT Station:
Calculated pt station based on your inputs.
-
Reference: Industry Standards.