Annulus Area Calculator
Find ring area as π × (outer radius² − inner radius²).
Open toolCircular Segment Area Calculator
Find minor circular segment area as r²(θ − sin θ)/2. Use the same length unit throughout.
Free to useNo sign-upRuns in your browser
Enter your details
Enter the inputs, then select Calculate.
Your result
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Result will appear here
How Circular Segment Area Calculator works
Find minor circular segment area as r²(θ − sin θ)/2.
Use the same length unit throughout. Areas use squared units and volumes use cubed units. Angle input is degrees; computation uses radians. Uses a series for small angles to avoid cancellation. Inputs and results use floating-point numbers and may be rounded. Results show up to 12 significant digits.
How to use Circular Segment Area Calculator
Follow the labelled inputs.
Enter circle radius
Replace the example with circle radius. The field labels specify the expected format and units.
Input and settings
Check the remaining inputs
Set minor central angle (degrees). Use the same length unit throughout.
Tool result
Run, review and save
Select Calculate. Review the calculated result, then copy it or download the result text.
Review the details
Examples and uses for Circular Segment Area Calculator
Check the supplied example
The starting example produces 1.14159265359. Find minor circular segment area as r²(θ − sin θ)/2.
Use your own inputs
Read the labels for circle radius and minor central angle (degrees). Use the same length unit throughout.
Record a reviewed result
Copy the calculated result into your notes. Keep the formula and assumptions with it if someone else needs to reproduce the calculation.
How to read the result
Read the units and assumptions with the output.
Find minor circular segment area as r²(θ − sin θ)/2.
Use the same length unit throughout. Areas use squared units and volumes use cubed units. Angle input is degrees; computation uses radians. Uses a series for small angles to avoid cancellation. Inputs and results use floating-point numbers and may be rounded. Results show up to 12 significant digits.
Supported input and limits
Check the stated scope before you run it.
Use the same length unit throughout. Areas use squared units and volumes use cubed units. Angle input is degrees; computation uses radians. Uses a series for small angles to avoid cancellation. Inputs and results use floating-point numbers and may be rounded. Results show up to 12 significant digits.
The input stays in this browser. Copy result and Download save the same displayed text.
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Open toolCircular Segment Area Calculator: common questions
Answers about using Circular Segment Area Calculator and understanding its results.
What inputs and assumptions apply?
Use the same length unit throughout. Areas use squared units and volumes use cubed units. Angle input is degrees; computation uses radians. Uses a series for small angles to avoid cancellation. Inputs and results use floating-point numbers and may be rounded. Results show up to 12 significant digits.
How can I save the result?
Copy result copies the displayed text. Download saves the same text as a TXT file. Processing runs in this browser without an account.
Calculate with your input
Check the calculated result, then copy or download it.