Circular Sector Calculator
The area and arc length of a circular sector from radius and angle.
Result
Sector area
19.63
Arc length
7.85
How it works
Area = (angle/360) × π × r²
A sector is a pie slice of a circle. Its area and arc length are the full circle’s values scaled by the angle over 360°.
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Frequently asked questions
What is a sector?
The region between two radii and the arc between them — a slice of pie.
What is the arc length?
The curved edge of the sector, a fraction of the full circumference.
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