# Circumference Calculator

Circle

Triangle

Square

Rectangle

Rhombus

Parallelogram

Ellipse

### More Calculators

BMI Calculator Area Calculator Circle Calculator Sphere Calculator Square Calculator Ellipse Calculator Rhombus Calculator Centroid Calculator Discount Calculator Exponent Calculator Triangle Calculator Rectangle Calculator Derivative Calculator Hemisphere Calculator Percentage Calculator Random Number Generator Parallelogram Calculator Right Triangle Calculator Quadratic Equation Solver Complex Number Calculator Linear Equation Calculator Regular Polygon Calculator Simple Interest Calculator Scalene Triangle Calculator Compound Interest Calculator Isosceles Triangle Calculator Equilateral Triangle Calculator Pythagoras Theorem Calculator Standard Deviation Calculator Matrix Multiplication Calculator## How To Use Circumference Calculator

Lets first understand, what is circumference and how we can calculate circumference of various 2-D shapes?

Circumference

The circumference is the perimeter of a circle or ellipse, that means, the circumference would be the arc length of the circle, as if it were opened up and straightened out to a line segment. Generally, the perimeter is the curve length around any closed figure.

Circle

A circle is a shape consisting of all points in a plane that are at a given distance from a given point, called the center of the circle.

The circumference of a circle is the distance around it.

The ratio of a circle's circumference to its diameter is \(\pi\), a constant approximately equal to 3.14159.

Let the Radius be \(R\) units.

Circumference will be \(2\pi R\) units.

Triangle

A triangle is a polygon with three edges and three vertices.

Any three points, when non-collinear, determine a unique triangle and simultaneously, a unique plane.

Let the three sides be \(A\), \(B\) and \(C\) units.

Perimeter (circumference) will be \((A+B+C)\) units.

Square

A square is a regular quadrilateral, means that it has four equal sides and four equal angles.

Let the Side Length be \(L\) units.

Perimeter (circumference) will be \(4L\) units.

Rectangle

A rectangle is a quadrilateral with four right angles and with equal opposite sides.

Let the Length and Width be \(L\) and \(W\) units respectively.

Perimeter (circumference) will be \(2(L + B)\) units.

Rhombus

A rhombus is a quadrilateral whose all four sides have the same length.

Let the side be \(L\) units.

Perimeter (circumference) will be \(4L\) units.

Parallelogram

A parallelogram is a simple quadrilateral with two pairs of parallel sides. The opposite or facing sides of a parallelogram are of equal length and the opposite angles of a parallelogram are of equal measure.

Let the two Adjacent Sides be \(A\) and \(B\) units.

Perimeter (circumference) will be \(2(A + B)\) units.

Ellipse

An ellipse is a plane curve surrounding two focal points, such that for all points on the curve, the sum of the two distances to the fixed point is a constant. The fixed point is called focal points of the ellipse.

Let the lengths of semi-major and semi-minor axes be \(a\) and \(b\) respectively,

Then circumference is given by

$$C\approx \pi \left(3*(a+b)-\sqrt{(3*a+b)*(a+3*b)}\right)$$For calculating circumference of the various 2-D shapes using above circumference calculator, you have to just write the values in the given input boxes and press the calculate button, you will get the result.