Calculadora da Circunferencia Gratis

Calcule a circunferencia (perimetro) de um circulo dado o raio ou o diametro. Formula C = 2πr.

Circunferência

43.9823

Área153.9380
Diâmetro14.0000
Ver formula →

Formula

How to Calculate the Circumference of a Circle

Formula

C = 2 × π × r

Or equivalently: C = π × d (where d is the diameter)

Where:

  • C = Circumference
  • π ≈ 3.14159
  • r = radius
  • d = diameter (2r)

    • Exemplo Resolvido

    Find the circumference of a circle with radius 7.

    1. 01C = 2 × π × 7
    2. 02= 14π
    3. 03= 14 × 3.14159
    4. 04≈ 43.9823

    Perguntas Frequentes

    What is circumference?

    Circumference is the distance around the edge of a circle — essentially the perimeter of a circle.

    What is the relationship between circumference and diameter?

    The circumference divided by the diameter always equals π (pi). This is actually the definition of pi: C/d = π.

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