Geometry Calculators

Area — Square

Compute area given side length.

Area — Rectangle

Area from width and height.

Area — Circle

Area using radius or diameter.

Perimeter — Triangle

Sum of side lengths.

Area — Triangle

Base & height or Heron's formula.

Volume — Cube

Compute volume of a cube.

Volume — Rectangular Prism

Length × width × height.

Volume — Cylinder

πr²h calculations.

Volume — Cone

1/3 · πr²h.

Volume — Sphere

4/3 · πr³ formula.

Surface Area

Surface area for common solids.

Sector Area

Area of circular sectors.

Polygon Area

Regular polygon area by apothem and side.

Triangle Solver

Solve sides/angles from inputs.

Pythagorean Theorem

Find missing side in right triangle.

Angle Conversion

Degrees ↔ Radians conversions.

Distance Between Points

2D and 3D coordinate distance.

Line Equation

Find slope and equation from points.

Circumference

Circle perimeter from radius/diameter.

Triangle Area (SAS)

Use two sides and included angle.

Heron's Formula

Triangle area from three sides.

Law of Cosines

Solve triangles with any three sides.

Law of Sines

Solve triangles with angles and sides.

Ellipse Area

Area using major and minor axes.

Parabola Properties

Focus, directrix, vertex, and equation.

Hyperbola Properties

Center, vertices, asymptotes, and foci.

Midpoint Formula

Find midpoint of a line segment.

Centroid of Triangle

Average of vertex coordinates.

Incenter

Center of incircle (angle bisectors).

Circumcenter

Center of circumcircle.

Orthocenter

Intersection of altitudes in triangle.

Volume — Frustum

Truncated cone or pyramid volume.

Volume — Torus

Donut-shaped solid volume.

Ellipse Perimeter

Approximate perimeter of ellipse.

Area — Rhombus

Using diagonals or side and angle.

Area — Trapezoid

Average of parallel sides × height.