Circle Calculator

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

Eingaben

Geben Sie einen Wert ein, um den Rest zu berechnen:

Radius

Durchmesser

Umfang

Fläche

cm²

calculator.interactive

Geben Sie Werte ein, um Ergebnisse zu sehen

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.

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Common shape areas

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