How does the Circular Sector Calculator work?

Area = (θ/360°) × πr² for degrees, or (θ/2) × r² for radians Then: Arc length = (θ/360°) × 2πr for degrees, or θ × r for radians Then: Perimeter = arc length + 2 radii Then: Central angle θ related to arc and radius.

Can you give an example of how to use the Circular Sector Calculator?

Example: Input r=5cm, angle 60deg gives a result of Area 13.09.

Is the Circular Sector Calculator free to use?

Yes — completely free with no registration, download, or subscription required. All calculations happen instantly in your browser.

How accurate is the Circular Sector Calculator?

Our Circular Sector Calculator uses verified mathematical formulas and is accurate to multiple decimal places. Results are calculated in real-time using the same methods used by professionals.

Matematik

Circular Sector Calculator

Circular Sector

Radius (r)

Central angle (θ radians)

Calculates circular sector area (pie-slice) from radius and central angle.

Difficulty:beginner

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Did You Know?

Pizza sizes increase exponentially; 14" pizza has 57% more area than 12".

References

›Sector Calculator

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