Area Calculator

Calculate the area of common two-dimensional shapes with accurate formulas, flexible measurement units and instant converted results.

Rectangle Area Calculator

Calculate the area of a rectangle, square, room, floor, wall or other four-sided rectangular surface.

Length (l)

Width (w)

Calculate the area of a triangle from all three side lengths using Heron's formula.

Edge 1 (a)

Edge 2 (b)

Edge 3 (c)

Calculate the area of a trapezoid from its two parallel bases and perpendicular height.

Base 1 (b₁)

Base 2 (b₂)

Height (h)

Calculate the area of a circle using its radius.

Radius (r)

Calculate the area of a circular sector from its radius and central angle. Enter the angle in degrees or radians.

Radius (r)

Angle (A)

Calculate the area of an ellipse using its semi-major and semi-minor axes.

Semi-major Axis (a)

Semi-minor Axis (b)

Calculate the area of a parallelogram from its base and perpendicular height.

Base (b)

Height (h)