Sector Area Calculator
Calculate the area of a circle sector using radius and central angle.
📐 Sector Parameters
Radius (r)
units
Central Angle
°
🧮 Angle Unit
Using degrees
🔢 Output Unit
Unit: m²
⚠️
Sector
0
Sector Area
0 m²
fraction of circle
Radius
0 units
Central Angle
0°
Arc Length
0 units
Fraction of Circle
0%
📊 Calculation Breakdown
How the formula works
Sector Area = (θ / 360°) × πr² | Arc Length = (θ / 360°) × 2πr
- r = Radius of the circle
- θ = Central angle (in degrees or radians)
- Sector Area = Fraction of the circle's total area
- Full Circle Area = πr²
- Arc Length = Portion of the circumference
- Full Circle = 360° or 2π radians
- Radians to Degrees = radians × 180°/π
- Degrees to Radians = degrees × π/180°