Arc Length Calculator

Arc length measures the actual curved path along the circle, while chord length is the straight-line distance between endpoints. The arc is always longer unless the angle is 0.

For a full circle (θ = 360° = 2π rad), the arc length equals the circumference: s = 2πr.

Use the formula: θ_radians = θ_degrees × π/180, or θ_degrees = θ_radians × 180/π.