Calculate Circular Arc

Calculator for the length of arc and chord, of radius and angle, in a circle. A circular arc is that part of the circular line, which is enclosed by an angle starting at the origin of the circle. Please enter two values (not c and l), the other two values will be calculated.

Circular Arc
Radius r:
Angle α: °
Chord length c:
Arc length l:
Round to    decimal places.


c = 2 * sin(α/2) * r

l = α/360° * π * r

Here you can convert radian into degrees.