Circle - Area Calculator - Calculator Site

Feb. 2025

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Area Calculator
Area of a circle

Area of a circle

The area and the circumference of circle is calculated from the radius using the formula.

When the radius r is input and "Calculate area of circle" button is clicked, the area and the circumference of the circle are calculated and displayed.

The area of the circle where the radius is 1

Area S: 3.1415926535898
Perimeter L: 6.2831853071796

Area Calculator

･Area of an equilateral triangle
･Area of triangle (base and height)
･Area of triangle (angle between two sides)
･Area of triangle (angle of one side and both ends)
･Area of triangle (length of 3 sides)
･Area of a square
･Area of rectangle
･Area of trapezoid
･Area of rhombus
･Area of parallelogram (base and height)
･Area of parallelogram (angle between two sides)
･Area of quadrilateral (4 sides and sum of opposite angles)
･Area of a circle
･Area of fan shape
･Area of bow shape

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Area Calculator

Simple Calculator

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From the radius, calculate the area of the circle and the perimeter with a mathematical formula.

Calculates the area and perimeter of the circle from the specified radius.

Area of a circle

The area of the circle where the radius is 1

Area Calculator

Simple Calculator

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From the radius, calculate the area of ​​the circle and the perimeter with a mathematical formula.

Calculates the area and perimeter of the circle from the specified radius.

Area of a circle

The area of the circle where the radius is 1

Area Calculator

Simple Calculator

Popular page

Share

From the radius, calculate the area of the circle and the perimeter with a mathematical formula.