Geometry Calculator

Select 2D Shape:

A = πr², P = 2πr

Radius:

A = a², P = 4a

Side Length:

A = l × w, P = 2(l + w)

Length: Width:

A = (b × h)/2, P = a + b + c

Base: Height: Side 1: Side 2: Side 3:

A = b × h, P = 2(b + side)

Base: Height: Side:

A = ((a + c)/2) × h, P = a + b + c + d

Top Base (a): Bottom Base (c): Height: Left Side (b): Right Side (d):

A = (d₁ × d₂)/2, P = 4 × a

Diagonal 1: Diagonal 2: Side Length:

A = (n × s²)/(4 × tan(π/n)), P = n × s

Number of Sides: Side Length:

A = π × a × b, P ≈ 2π × √((a² + b²)/2)

Semi-major Axis (a): Semi-minor Axis (b):

Select 3D Shape:

V = a³, SA = 6a²

Side Length:

V = l × w × h, SA = 2(lw + lh + wh)

Length: Width: Height:

V = (4/3)πr³, SA = 4πr²

Radius:

V = πr²h, SA = 2πr(r + h)

Radius: Height:

V = (1/3)πr²h, SA = πr(r + √(r² + h²))

Radius: Height:

V = (1/3)a²h, SA = a² + 2a√(a²/4 + h²)

Base Side Length: Height:

V = (1/2 × base × height × length), SA = (side1+side2+side3)×length + (base×height)

Triangle Base: Triangle Height: Prism Length: Triangle Side 1: Triangle Side 2: Triangle Side 3:

V = 2π²Rr², SA = 4π²Rr

Major Radius (R): Minor Radius (r):