Circle Calculator

Calculate area, circumference, radius, and diameter from any known value

Entrées

Entrez une valeur pour calculer le reste:

Rayon

Diamètre

Circonférence

Aire

cm²

calculator.interactive

Entrez des valeurs pour voir les résultats

Circumference: C = 2πr = πd

Area: A = πr²

Diameter: d = 2r

Note: Calculations are provided as-is for educational and planning purposes. For critical applications, always verify results independently.

Calculate rectangular areas

Solve any triangle

Common shape areas

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