# How to Calculate Arc Length?

A simple tutorial on what is arc length? and the best ways to determine the arc length of the circle.

## Finding Arc Length of a Circle

Arc length refers to the Length of the arc along the portion of the circle. It is a part of the total circumference of the circle. So Arc Length can be found by knowing the Circumference and Central Angle of the Circle. It is calculated by considering a part of the whole circle. Use our online short tutorial to learn how to calculate arc length of the circle with simple example and images.

**Arc Length Formula: **

The formula to determine the arc length of a circle is given below which uses the values of radius and central angle of the arc.

Arc Length = 2πR (C / 360 )

**Where**,

R - Radius

C - Central angle of the arc in degrees

**Arc Length Example: **

Finding the arc length of a circle is simple with the below given formula.

**Step 1:**

Given,

Radius - 10

Central Angle - 64 Radians

**Step 2:** Substitute the given values in the formula.

Arc Length = 2πR (C / 360 )

= 2 x 3.14 x 10 (64 / 360)

= 62.8 (0.18)

= 11.16

The arc length of the circle is 11.16

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