Circle Calculation

Calculator and formulas for calculating circles

Circle Calculator


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

To perform the calculation, select the required parameter in the menu and enter its value. Then click the 'Calcutate' button.


Circle Calculator

 Input
Argument type
Argument value
Decimal places
 Results
Radius
Diameter
Circumference
Area

Formulas for calculating circles


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

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