The circle calculator can quickly compute all mathematical variants of a circle simply by entering one of the circle elements. After inserting one component, the answer will be displayed very quickly because the process of carrying out calculations is completely automatic.

To calculate the area and spherical area of a circle it is only required to insert the values of the radius, circumference or diameter. Each factor of the circle will eventually have its own algebraic relation.

## Formulas

This calculator uses the following formulas:

*Radius = Diameter / 2*

*Circumference of a circle = 2 × π ×
Radius*

*Surface area of a sphere = 4 × π ×
Radius ^{ 2}*

*Area of a circle = π × Radius ^{
2}*

*Where π is the constant (3.141592654)*

The circle calculator can quickly compute all mathematical variants of a circle simply by entering one of the circle elements. After inserting one component, the answer will be displayed very quickly because the process of carrying out calculations is completely automatic.

To calculate the area and spherical area of a circle it is only required to insert the values of the radius, circumference or diameter. Each factor of the circle will eventually have its own algebraic relation.

## Formulas

This calculator uses the following formulas:

*Radius = Diameter / 2*

*Circumference of a circle = 2 × π ×
Radius*

*Surface area of a sphere = 4 × π ×
Radius ^{ 2}*

*Area of a circle = π × Radius ^{
2}*

*Where π is the constant (3.141592654)*