left-arrow-icon
Areaconvertericon

Area and Perimeter Calculator

Find the Area and Perimeter of Circle, Square, Rectangle, Triangle, Kite, Rhombus, Pentagon, Hexagon, Parallelogram, Trapezoid, Octagon

HomeMath

2d Shapes Area Calculator


Circle Area Calculator - Enter radius and calculate the circle area

=

Formula to Calculate Area and Perimeter of a Circle

Area of a Circle using Radius:

Area = πr² 

r is radius and Pi value is 3.14

Circle icon

Radius of a Circle given its area:

Radius = square root (A / π)

A is area and Pi value is 3.14

Perimeter of a Circle using Radius:

Perimeter = 2πr 

r is radius and Pi value is 3.14

Circle icon

Find the Radius of a Circle for a given Perimeter

Radius = square root (C / 2π)

C is Circumference or Perimeter and Pi value is 3.14

Formula to Calculate Area and Perimeter of a Sector

Area of a Sector using Radius:

Area =(θ/360°) x πr² 

r is radius, Pi value is 3.14 and 𝜃 is the angle of the sector.

Perimeter of a Sector using radius:

Perimeter = 2r + ((θ/360) × 2πr )

r is radius, Pi value is 3.14 and 𝜃 is the angle of the sector.

Formula to Calculate Area and Perimeter of an Oval

Area of Oval:

Area = π(A + B)/2

A is Major Axis, B is Minor Axis and Pi value is 3.14

Oval icon

Perimeter of an Oval:

Perimeter = 2π square root((A² + B²)/2)

A is Major Axis, B is Minor Axis and Pi value is 3.14

Formula to Calculate Area and Perimeter of an Ellipse

Area of Ellipse:

Area = πAB

A is Major Axis, B is Minor Axis and Pi value is 3.14

Ellipse icon

Perimeter of an Ellipse:

Perimeter = π (A + B) (1 + 3h / 10 +square root( 4 - 3h))

A is Major Axis, B is Minor Axis , h is (A - B)² / (A + B )² and Pi value is 3.14

Formula to Calculate Area and Perimeter of a Rhombus

Area of a Rhombus:

Area = PQ / 2

P is Diagonal 1 and Q is Diagonal 2

rhombus icon

Perimeter of a Rhombus:

Radius = 2 * square root (P² + Q²)/2

P is Diagonal 1 and Q is Diagonal 2

Formula to Calculate Area and Perimeter of a Parallelogram

Area of Parallelogram:

Area = ( b*h)

h is height and b is base

parallelogram icon

Perimeter of Parallelogram

Perimeter = 2(a + b)

a and b are the length of two adjacent sides of parallelogram

Formula to Calculate Area of a Square

Area of Square:

Area = a²

a is side

square icon

Find the Sides of a Square given its area

Side = Square Root (A)

A is area

Perimeter of Square:

Perimeter = 4a

a is side

Find Sides of a Square using Perimeter:

Side = P / 4

P is Perimeter

Formula to Calculate Area and Perimeter of a Rectangle

Area of a Rectangle:

Area = L * W

L is Length and W is Width

rectangle icon

Perimeter of Rectangle:

Perimeter = 2 * (L + W)

L is Length and W is Width

Formula to Calculate Area and Perimeter of a Triangle

Area of Equilateral Triangle:

Area = square root (3)/4 a²

a is side

equilateralTriangle icon

Area of Isosceles Triangle:

h = square root (a² - b²/4)

Area = bh

b is base and h is Height

isoscelesTriangle icon

Area of Scalene Triangle:

S = a + b + c / 2

Area = square root (s (s-a) (s-b) (s-c))

a, b and c are sides

scaleneTriangle icon

Perimeter of Equilateral Triangle:

Perimeter = 3a

a is side

equilateralTriangle icon

Perimeter of Isosceles Triangle:

Perimeter = 2a + b

b is base and a is side

isoscelesTriangle icon

Perimeter of Scalene Triangle:

Perimeter = a + b + c

a, b and c are sides

scaleneTriangle icon

Formula to Calculate Area and Perimeter of a Trapezoid

Area of Trapezoid:

Area = 1/2 (a + b) h

a and b are axes and h is height

trapezoid icon

Perimeter of Trapezoid:

Perimeter = (a + h + b + h)

a and b are axes and h is height

Formula to Calculate Area and Perimeter of a Pentagon

Area of Pentagon:

Area = 1/4 square root(5 (5 + 2 square root(5)))a²

A is Side

pentagon image

Perimeter of Pentagon:

Perimeter = 5a

a is Side

Formula to Calculate Area and Perimeter of a Hexagon

Area of Hexagon:

Area = 3 * square root (3) /2 a²

a is side

Cylindericon

Perimeter of Hexagon:

Perimeter = 6a

a is side

Formula to Calculate Area and Perimeter of an Octagon

Area of Octagon:

Area = 2(1 + square root (2))a²

a is Side

octagonicon

Perimeter of Octagon:

Perimeter = 8a

a is Side

Formula to Calculate Area and Perimeter of a Kite

Area of Kite:

Area = ab/2

a is diagonal 1 and b is diagonal 2

kiteicon

Perimeter of Kite:

Perimeter = 2(a + b)

a is diagonal 1 and b is diagonal 2