Рассчитать arc length, sector area, and chord length for any circle sector. Enter radius and central angle to get instant results with formulas shown.
This arc length calculator computes the arc length, sector area, and chord length of a circle sector. Enter the radius and central angle to get instant results with the formulas used. Supports both degrees and radians. Все calculations happen in your browser — no data is sent to any server.
Arc length = r × θ, where r is the radius and θ is the central angle in radians. If the angle is in degrees, first convert to radians: θ(rad) = θ(deg) × π/180.
A sector is a region of a circle bounded by two radii and the arc between them. It is like a "slice of pie" from the circle.
Sector area = ½ × r² × θ, where r is the radius and θ is the central angle in radians. For degrees: A = (θ/360) × πr².