Kostenloser Kreisumfangrechner
Berechne den Umfang eines Kreises anhand des Radius oder Durchmessers. Verwende die Formel U = 2 × π × r.
Umfang
43.9823
Fläche153.9380
Durchmesser14.0000
Formel
How to Calculate the Circumference of a Circle
Formula
C = 2 × π × r
Or equivalently: C = π × d (where d is the diameter)
Where:
Lösungsbeispiel
Find the circumference of a circle with radius 7.
- 01C = 2 × π × 7
- 02= 14π
- 03= 14 × 3.14159
- 04≈ 43.9823
Häufig Gestellte Fragen
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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