Circle circumference and area

Calculators and formulas for calculating circumference and area of circle

Circle online calculator


This function calculates the area and the perimeter of a circle from a given circle property.

Enter one of the circle property, then click the 'Calcutate' button.


Circle Calculator

  Input
Argument type
Argument value

Decimal places
  Result
Circumference
Area

Formulas for calculating circles


calculating area Area \(\displaystyle A = r^2 · π\) \(\displaystyle = \frac{d^2 · π}{4}\)
calculating perimeter Circumference   \(\displaystyle c = d · π\)

Is this page helpful?            
Thank you for your feedback!

Sorry about that

How can we improve it?