A sector is a "pie slice" shaped region of a circle bounded by two radii and an arc.

What is the sector area formula?

A = (1/2) x r^2 x theta, where theta is the central angle in radians.

Sector Area Calculator

Enter the radius and central angle (in degrees or radians) to calculate the area of a sector. Formula: A = (1/2) x r^2 x theta.

Radius

Central Angle

Angle Unit

Sector Area

78.5398 sq units

Arc Length

15.708

Sector Perimeter

35.708

Full Circle Area

314.1593 sq units

Fraction of Circle

25%

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