Area Calculator

Shape:

Area Formula:

Diagram of a triangle showing base b and height h

Diagram of a triangle showing a = side a, b = side b, and c = side c

Diagram of a triangle showing side a, side b, and angle gamma

Diagram of a triangle showing side a, side b, and angle beta

Diagram of a triangle showing angle beta, angle gamma, and side a

Diagram of a triangle showing angle beta, angle gamma, and side c

Diagram of a rectangle showing l = length and w = width

Diagram of a square showing a = edge length

Diagram of a trapezoid showing a = base a, b = base b, and h = height

Diagram of a parallelogram showing b = base and h = height

Diagram of a rhombus showing a = edge length and h = height

Diagram of a kite showing edges a & b, and diagonals p and q

Diagram of a circle showing r = radius

Diagram of an ellipse showing a = axis a and b = axis b

Diagram of a sector showing r = radius and θ = angle

Diagram of a circular segment showing the radius, central angle, chord length, height, and arc length

Diagram of an annulus showing the outer radius R and inner radius r

Diagram of a pentagon showing a = edge length

Diagram of a hexagon showing a = edge length

Diagram of an octagon showing a = edge length

Diagram of a regular polygon showing a = edge length

Diagram of an irregular quadrilateral showing the diagonal d, height h1, and height h2

Diagram of a border showing l = outer length, w = outer width, a = inner length, and b = inner width

Area Formula

A = bh ÷ 2

s = ¹/₂(a + b + c)
A = s(s - a)(s - b)(s - c))

A = ab ÷ 2 × sin(γ)

α = arcsin(a × sin(β) ÷ b)
γ = 180 - α - β
A = ab ÷ 2 × sin(γ)

α = 180 - β - γ
h = a × sin(γ)
b = a × sin(β) ÷ sin(α)
A = bh ÷ 2

α = 180 - β - γ
b = c × sin(β) ÷ sin(γ)
a = c × sin(α) ÷ sin(γ)
h = a × sin(γ)
A = bh ÷ 2

A = a²

a = edge length

A = l × w

l = length
w = width

A = ¹/₂(a + b)h

a = base a
b = base b
h = height

A = b × h

b = base
h = height

A = a × h

a = edge length
h = height

A = p × q2

p = diagonal p
q = diagonal q

A = πr²

r = radius

A = πR² - πr²

R = radius
r = radius

A = πab

a = axis a
b = axis b

A = (θ ÷ 360)πr²

r = radius
θ = angle

A = (θ × π360 – sin(θ)2) × r²

r = radius
θ = angle

A = (a² × 5) ÷ (4 × tan(π ÷ 5))

a = edge length

A = (a² × 6) ÷ (4 × tan(π ÷ 6))

a = edge length

A = (a² × 8) ÷ (4 × tan(π ÷ 8))

a = edge length

A = (a² × n) ÷ (4 × tan(π ÷ n))

a = edge length
n = number of sides

A = 1/2 × d × (h₁ + h₂)

d = diagonal
h₁ = height 1
h₂ = height 2

A = (l × w) - (a × b)

l = outer length
w = outer width
a = inner length
b = inner width

Base b:

Height h:

Side a:

Side b:

Side c:

Angle β:

Angle γ:

Edge a:

Length l:

Width w:

Base a:

Base b:

Base b:

Height h:

Diagonal p:

Diagonal q:

Radius r:

Radius R:

Diameter d:

Angle θ:

Axis a:

Axis b:

Number of Sides:

Diagonal d:

Height h₁:

Height h₂:

Outer Length:

Outer Width:

Inner Length:

Inner Width:

Area Result:

Learn more at Inch Calculator

Add this calculator to your site