Area of a sector calculator

Image of a sector

Instructions for using this area of a sector calculator

The calculator is not hard to use. If you are not sure what a sector is, study my lesson about sector in the geometry section of the website

Enter the length of the radius of the circle

Enter the measure of the angle between the radii

Then click on the button that says calculate

Do not enter numbers with a slash (/)! If you do, the wrong answer will be computed

Therefore, convert all fractions into decimals before entering numbers

Enter all numbers without the unit. For example, if r = 5 cm, enter 5.

For the angle, enter a positive number smaller or equal to 360

Enter n or the angle:

Enter the radius of the circle


The area of this sector is :  

Buy a comprehensive geometric formulas ebook. All geometric formulas are explained with well selected word problems.

Need a math tutor?
Get an answer in 10 minutes or less from a math expert!

Justanswer features top-notch math experts handpicked by personnel after they have taken and passed a rigourous math test and after their credentials have been verified by a third party

Most math experts have bachelor's or master's degree in math or a related field

Ask a Math Tutor or Teacher Now

We have partnered with JustAnswer so that you can get an answer ASAP.


New math lessons

Your email is safe with us. We will only use it to inform you about new math lessons.

Page copy protected against web site content infringement by Copyscape

Recent Articles

  1. Two Beautiful Law of Sines Problems

    Oct 17, 16 07:37 PM

    Two great law of sines problems that will show you how to use the law of sines to solve real life problems

    Read More