GIVE EVERY DIMENSION A MEANING.

Every shape.
A little more understood.

Explore areas, volumes, diagonals and coordinates. Thirty geometry calculators, with dimensions and assumptions made explicit.

30 focused calculatorsNo sign-upDefinitions, clearly explained

GEOMETRY

A = πr²

30 FOCUSED TOOLSONE CLEAR RESULT ↗

English interface · Local calculations · No sign-up.

2D SHAPESDisplay currency

Square

Method & assumptions

YOUR GEOMETRY TOOLKIT

Find your next calculation.

30 calculators, together on one page.

Interactive calculators require JavaScript. Available tools:

Square — Find the area, perimeter and diagonal of a square.

Rectangle — Calculate area, perimeter and diagonal from two sides.

Triangle from base and height — Find a triangle’s area using a perpendicular height.

Triangle from three sides — Find area and perimeter from three valid sides.

Right triangle — Calculate the hypotenuse and area from perpendicular legs.

Equilateral triangle — Find area, height and perimeter from one equal side.

Isosceles triangle — Calculate height and area from the equal sides and base.

Circle from radius — Find circle area and circumference from its radius.

Circle from diameter — Calculate area and circumference from a diameter.

Circular sector — Calculate sector area, arc length and boundary length.

Ellipse — Find ellipse area and an approximate perimeter.

Annulus — Find the area between two concentric circles.

Trapezoid — Calculate area from parallel bases and perpendicular height.

Parallelogram — Use adjacent sides and their included angle.

Rhombus from diagonals — Find rhombus area and perimeter from perpendicular diagonals.

Kite area — Calculate area from a kite’s perpendicular diagonals.

Regular polygon — Find area, perimeter and radii for a regular polygon.

Polygon interior angles — Find the angle sum and each angle of a regular polygon.

Cube — Calculate cube volume, surface area and space diagonal.

Rectangular prism — Calculate volume and surface area of a rectangular solid.

Cylinder — Find right circular cylinder volume and surface area.

Cone — Calculate right cone volume, slant height and surface area.

Sphere — Find sphere volume and surface area.

Hemisphere — Calculate half-sphere volume and curved or closed surface area.

Triangular prism volume — Find prism volume from a triangular base and prism length.

Square pyramid — Calculate a right square pyramid’s volume and surface area.

Cone frustum — Calculate a truncated right cone’s volume and surface area.

Distance between points — Calculate the straight-line distance in a 2D plane.

Midpoint of two points — Find the point halfway along a line segment.

Line through two points — Find slope and y-intercept, or identify a vertical line.

01 / FOCUSED

Thirty distinct tools.

Each calculator has its own inputs, definition and worked example.

02 / TRANSPARENT

Know the method.

See the formula and domain restrictions next to the result. Precision and assumptions are explained.

03 / LOCAL

Your inputs stay in your browser.

Calculations run locally. Advertising and hosting practices are described separately in the privacy page.