Arc Length, Chord and Area of a sector - Geometry Calculator

An easy to use online calculator to calculate the arc length s , the length d of the Chord and the area A of a sector given its radius and its central angle t.

Formulas for arc Length, chord and area of a sector

formulas for arc Length, chord and area of a sector
Figure 1. formulas for arc Length, chord and area of a sector
In the above formulas t is in radians. In this calculator you may enter the angle in degrees, or radians or both.

How to use the calculator

Enter the radius and central angle in DEGREES, RADIANS or both as positive real numbers and press "calculate". The outputs are the arclength s, area A of the sector and the length d of the chord.

radius =
angle in radians =
angle in degrees =


for angle in radians
arclength s =

area A = chord d =

for angle in degrees
arclength =

area A = chord d =

More References and links

Sectors and Circles Problems.
Circles, Sectors and Trigonometry Problems with Solutions and Answers.
Online Geometry Calculators and Solvers.