External Distance evaluator uses External Distance = Radius of Circular Curve*((sec(1/2)*Central Angle of Curve*(180/pi))-1) to evaluate the External Distance, External Distance (Exact) is defined as the distance from point of intersection of tangents to midpoint of curve. External Distance is denoted by E symbol.
How to evaluate External Distance using this online evaluator? To use this online evaluator for External Distance, enter Radius of Circular Curve (Rc) & Central Angle of Curve (I) and hit the calculate button.