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CALCULATION DESK
Compute circumference (2πr) and area (πr²) from a supplied radius, with the diameter derived alongside so one input answers the three most common circle questions.
WHAT THIS DOES
Runs entirely in your browser.
/tools/circle-calculatorcircle-calcv4.0.0LOCAL · LOCAL RUNIMPLEMENTED — This workbench is functional in the current release.Presets for this workbench
No preset yet. A preset stores the values in this form — never the result — and only for workbenches that run entirely in your browser.
Collections
Saved on this device only. Turn on sync to carry them to another device.
METHOD / LOCAL RUN
Circumference = 2 × π × r. Area = π × r².
Boundary: Perfect circles only. No ellipse, sector, or chord calculations.
The calculation or transformation runs in your browser using the values entered above. No input is sent to UtilityForge for this tool.
EXAMPLES / LOCAL RUN FIXTURES
FAQ
No. The circle calculator runs locally.
The workbench states the exact method behind every result — the formula or procedure this page runs — so you can verify the computation instead of trusting a black box.
No. This workbench runs in the page: Radius are read by the code your browser already downloaded, and UtilityForge receives neither the values nor the result.
Perfect circles only. No ellipse, sector, or chord calculations.
RELATED TOOLS
LOCAL — Runs entirely in your browser.
COMMON USE CASES / SOURCE NOTE
Last reviewed:
Source information: Local arithmetic with Math.PI.