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Circumference

Calculate Circumference instantly with the exact formula and a worked example. Free online calculator — no signup.

Circumference

Radiusm
Circumference
31.4159m
2·π·rCalculate Circumference instantly with the exact formula and a worked example. Free online calculator — no signup.

More about: Circumference

What it calculates

The “Circumference” calculator computes Circumference in m from 1 parameter: radius (m).

A core calculation for studying, engineering tasks, and checking solutions.

Example calculation

With parameters Radius = 5 m the result is 31.42 m (2·π·r).

How to use

  1. Enter the parameter values — every field above is adjustable with a slider.
  2. The result and related metrics are calculated automatically as you type.
  3. Use the additional metrics shown (if any) where needed.
  4. Copy the result or bookmark the page.

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