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2d Shapes Area and Perimeter Calculator

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

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2d Shapes Area Calculator


Circle Area Calculator - Enter radius and calculate the circle area

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Area of Circle Formula

Formula to calculate Area of a Circle using Radius

Area = πr² 

r is radius and Pi value is 3.14

Circle icon

Find the Radius of a Circle for a given Area

Radius = square root (A / π)

A is area and Pi value is 3.14

Formula to calculate 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

Area of Sector Formula

Formula to calculate Area of a Sector

Area =(θ/360°) x πr² 

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

Formula to calculate Perimeter of a Sector

Perimeter = 2r + ((θ/360) × 2πr )

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

Area of Oval Formula

Area of Oval Formula

Area = π(A + B)/2

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

Oval icon

Formula for Perimeter of a Oval

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

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

Area of Ellipse Formula

Area of Ellipse Formula

Area = πAB

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

Ellipse icon

Formula for Perimeter of a 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

Area of Rhombus Formula

Formula to calculate Area of a Rhombus

Area = PQ / 2

P is Diagonal 1 and Q is Diagonal 2

rhombus icon

Find the Perimeter of a Rhombus for a given Diagonal Value

Radius = 2 * square root (P² + Q²)/2

P is Diagonal 1 and Q is Diagonal 2

Area of a Parallelogram Formula

Area of a Parallelogram

Area = ( b*h)

h is height and b is base

parallelogram icon

Perimeter of a Parallelogram

Perimeter = 2(a + b)

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

Area of a Square Formula

Formula to calculate Area of a Square using side

Area = a²

a is side

square icon

Find the side of a Square for a given area

Side = Square Root (A)

A is area

Formula to calculate Perimeter of a Square using side

Perimeter = 4a

a is side

Find the side of a Square for a given area

Side = P / 4

P is Perimeter

Area of a Rectangle Formula

Formula to calculate Area of a Rectangle using Length and Width

Area = L * W

L is Length and W is Width

rectangle icon

Formula to calculate Perimeter of a Rectangle using Length and Width

Perimeter = 2 * (L + W)

L is Length and W is Width

Triangle Area Formula

Formula to calculate Area of a Equilateral Triangle using Side

Area = square root (3)/4 a²

a is side

equilateralTriangle icon

Formula to calculate Area of a Isosceles Triangle using Base and Height

h = square root (a² - b²/4)

Area = bh

b is base and h is Height

isoscelesTriangle icon

Formula to calculate Area of a Scalene Triangle using Side

S = a + b + c / 2

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

a, b and c are sides

scaleneTriangle icon

Formula to calculate Perimeter of a Equilateral Triangle using Side

Perimeter = 3a

a is side

equilateralTriangle icon

Formula to calculate Perimeter of a Isosceles Triangle using base and side

Perimeter = 2a + b

b is base and a is side

isoscelesTriangle icon

Formula to calculate Perimeter of a Scalene Triangle using Base and Height

Perimeter = a + b + c

a, b and c are sides

scaleneTriangle icon

Trapezoid Area Formula

Formula to calculate Area of a Trapezoid using Axes and Height

Area = 1/2 (a + b) h

a and b are axes and h is height

trapezoid icon

Formula to calculate Perimeter of a Trapezoid using Axes and Height

Perimeter = (a + h + b + h)

a and b are axes and h is height

Pentagon Area Formula

Formula to calculate Area of a Pentagon using Side

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

A is Side

pentagon image

Formula to calculate Perimeter of a Pentagon using Side

Perimeter = 5a

a is Side

Hexagon Area Formula

Area of a Hexagon

Area = 3 * square root (3) /2 a²

a is side

Cylindericon

Perimeter of a Hexagon

Perimeter = 6a

a is side

Octagon Area Formula

Formula to calculate Area of a Octagon using Side

Area = 2(1 + square root (2))a²

a is Side

octagonicon

Formula to calculate Perimeter of a Octagon using Side

Perimeter = 8a

a is Side

Kite Area Formula

Formula to calculate Area of a Kite using Diagonals

Area = ab/2

a is diagonal 1 and b is diagonal 2

kiteicon

Formula to calculate Perimeter of a Kite using Diagonals

Perimeter = 2(a + b)

a is diagonal 1 and b is diagonal 2

Frequently Asked Questions on Area Calculator and Area Formula

FAQ icon

  • Area of a circle is πr² where r is radius and Pi value is 3.14

  • Area of triangle is square root (3)/4 a² where a is side.

  • Area of rectangle is L * W where L is Length and W is Width

  • Area of a trapezoid is 1/2 (a + b) h where a and b are axes and h is height

  • Area of scalene triangle is bh where b is base and h is Height

  • Area of square is a² where a is side

  • Area of parallelogram is b*h where h is height and b is base

  • Diameter = 2 × r where r is radius

  • Area of triangle is square root (3)/4 a² where a is side

  • Perimeter of rectangle is 2 * (L + W) where L is Length and W is Width

  • Perimeter of circle is 2πr where r is radius and Pi value is 3.14

  • Area of rectangle is L * W where L is Length and W is Width

  • Area of sphere is 4πr² where r is radius and Pi value is 3.14

  • Area of equilateral triangle is square root (3)/4 a² where a is side

  • Area of rhombus is PQ / 2 where P is Diagonal 1 and Q is Diagonal 2

  • Area of a right triangle is ab/2 where a and b are sides

  • Perimeter of square is 4a where a is side

  • Area of sector (θ/360°) x πr² where r is radius, Pi value is 3.14 and 𝜃 is the angle of the sector.

  • Area of hexagon is 3 * square root (3)/2 a² where a is side

  • Area of semicircle is 1/2 πr² where r is radius and Pi value is 3.14

  • Area of parallelogram is b * h where h is height and b is base

  • Area of sector is (θ/360°) x πr² where r is radius, Pi value is 3.14 and 𝜃 is the angle of the sector.

  • Area of Isosceles triangle is bh where b is base and h is Height

  • Area of polygon is 1/2 ap where a is apothem and p is perimeter

  • Area of kite is ab/2 where a is diagonal 1 and b is diagonal 2

  • Area of ellipse is πAB where A is Major Axis, B is Minor Axis and Pi value is 3.14

  • Area of octagon is 2(1 + square root (2))a² where a is Side