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CalcVerse📐 GeometryCircle Calculator
⭕

Circle Calculator

Radius, diameter, circumference and area all linked

Grades 5–8

⭕ Circle Calculator

π

π (Pi) = 3.14159265358979…

The ratio of any circle's circumference to its diameter — forever!

I know the:

drC

Radius

r = d/2

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Diameter

d = 2r

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Circumference

C = 2πr

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Area

A = πr²

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Enter a value above to see all circle measurements! ✨