Horizontal Curve Calculator
Tangent length, curve length, chords and a setting-out table from the radius and deflection angle.
| Chainage (m) | Arc from TC (m) | Deflection angle | Chord from previous peg (m) | Chord from TC (m) |
|---|
Simple circular curve: T = R tan(Δ/2) · L = πRΔ/180 · C = 2R sin(Δ/2) · E = R(sec(Δ/2) − 1) · M = R(1 − cos(Δ/2)). Deflection to a peg = arc ÷ 2R (radians). Lengths in metres.
Indicative result, not a survey. Only a plan prepared and signed by a registered surveyor is valid for title, legal or design purposes.
Calculated in your browser. Nothing you enter is stored or sent.
How it works
Uses the arc definition of a simple circular curve. The setting-out table gives the deflection angle from the tangent at TC to each peg, for a theodolite or total station set up at TC.
Transition (spiral) curves and super-elevation are not included.
Turn this estimate into a survey
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