Sector Area Calculator

Shape :
Calculate :
rθ
A = (θ°/360°) x πr2
Advertisement

What is a Sector ?

In geometry, a sector refers to a portion of a circle enclosed by two radii and the corresponding arc.

The formula for calculating the area (A) of a sector is given by:

A = (θ°/360°) x πr2

where:

  • A is the area of the sector
  • π (pi) is a mathematical constant approximately equal to 3.14159265359
  • r is the radius of the circle
  • θ is the angle of sector, formed by the two radii

Keep in mind that angles should be in degrees for this formula. If your angle is in radians, you need to convert it to degrees before using the formula.

Author Information

Rajesh V U photo

Rajesh V U

Full-Stack Developer & Storage Technologist | Creator of UnitSmash.com
Last updated: September 1, 2026

I am a Storage Technologist with strong experience in enterprise storage systems, Angular development, and web-based tools. I enjoy building practical calculators, converters, and utilities, and I also create original cartoons. I share my tools, articles, and creative work on my personal website, rajeshvu.com.