±Free
Circle sector and chord
Calculate arc length, sector area and chord length from a central angle in degrees.
Enter the positive radius and central angle in degrees. After converting the angle to radians, the calculator returns rθ for arc length, r²θ/2 for sector area and 2r sin(θ/2) for the chord.
How to use
- Enter your text, values, or image.
- Adjust the options and run the tool.
- Copy or download your result.
Worked example
Example input
Radius: 2 Central angle (degrees): 90
Example result
{
"arcLength": 3.14159265359,
"sectorArea": 3.14159265359,
"chordLength": 2.82842712475
}Limitations and details
Angles must be between 0° and 360°; this returns sector area, not the area of the segment between an arc and its chord.
Inputs and options
- Radius
- Number
- Central angle (degrees)
- Number · Minimum: 0 · Maximum: 360
Frequently asked questions
Is this tool free and private?
Yes. All 300 tools are free in this phase. Processing happens in your browser; your input and files are not sent to our servers.