Arc Length Calculator

Solve arc length, radius, or angle for a circular arc

s = r * theta; chord = 2r sin(theta / 2)
Arc length
7.853982
Radius
5
Angle
90 deg / 1.570796 rad
Chord length
7.071068
Arc length diagramCircular arc with labeled radius, central angle, arc length, and chord.r = 5arc = 7.854anglechord