Compound Curve Calculator

Enter any 4 or more known values — solver chains through all applicable formulas

Units

Angle Input

Distance Precision

Angle Precision

Compound Curve Parameters

Enter any 4 or more known values

Delta Angles

Total Delta Δ

Delta (Large) Δ_l

Delta (Small) Δ_s

Radii & Main Tangents

Large Radius R_l

Small Radius R_s

Long Tangent T_long

Short Tangent T_short

Sub-tang. (Large) T_l

Sub-tang. (Small) T_s

Curve 1 — Large Radius

Arc Length L₁

Chord C₁

External E₁

Mid-ordinate M₁

Curve 2 — Small Radius

Arc Length L₂

Chord C₂

External E₂

Mid-ordinate M₂