Clarity65 FREE TOOLS
Geometry, made clearer.
Explore areas, perimeters, volumes and geometric measurements with clearly labeled dimensions.
Tools in this category
Square Area Calculator
Find the area enclosed by four equal sides.
Square Perimeter Calculator
Find the boundary length of a square.
Square Diagonal Calculator
Find the corner-to-corner distance across a square.
Rectangle Diagonal Calculator
Find the diagonal from a rectangle’s two perpendicular sides.
Parallelogram Area Calculator
Measure a parallelogram using base and perpendicular height.
Parallelogram Perimeter Calculator
Find total boundary length from adjacent parallelogram sides.
Rhombus Area Calculator
Find a rhombus area using its perpendicular diagonals.
Kite Area Calculator
Calculate kite area from its two perpendicular diagonals.
Ellipse Area Calculator
Find the enclosed area of an ellipse from its semiaxes.
Ellipse Perimeter Calculator
Estimate an ellipse boundary with Ramanujan’s approximation.
Semicircle Area Calculator
Calculate the area of half a circle.
Semicircle Perimeter Calculator
Find the curved edge plus diameter of a semicircle.
Annulus Area Calculator
Find the area between two concentric circles.
Arc Length Calculator
Find the distance along a circular arc from its angle.
Sector Area Calculator
Find the area of a circular wedge.
Chord Length Calculator
Find the straight line connecting the ends of a circular arc.
Circular Segment Area Calculator
Find the region between a chord and its circular arc.
Triangle Area from Three Sides Calculator
Calculate triangle area when all three side lengths are known.
Equilateral Triangle Area Calculator
Calculate area from one side of an equilateral triangle.
Equilateral Triangle Height Calculator
Find the perpendicular altitude of an equilateral triangle.
Triangle Area from Two Sides and Angle Calculator
Find area from two sides and their included angle.
Law of Cosines Calculator
Find a triangle’s third side from two sides and the included angle.
Regular Polygon Area Calculator
Find area from equal side length and the number of sides.
Regular Polygon Interior Angle Calculator
Find each interior angle of an equiangular regular polygon.
Polygon Diagonals Calculator
Count all diagonals between nonadjacent vertices.
Regular Polygon Apothem Calculator
Find the perpendicular center-to-side distance of a regular polygon.
Cube Volume Calculator
Find the volume enclosed by a cube.
Cube Surface Area Calculator
Find the combined area of a cube’s six faces.
Cube Space Diagonal Calculator
Find the interior diagonal between opposite cube corners.
Rectangular Prism Volume Calculator
Find the capacity of a rectangular box from three dimensions.
Rectangular Prism Surface Area Calculator
Find the total area of all six rectangular faces.
Rectangular Prism Diagonal Calculator
Find the longest corner-to-corner distance through a rectangular box.
Cylinder Volume Calculator
Find the capacity of a right circular cylinder.
Cylinder Surface Area Calculator
Find curved side area plus both circular ends.
Cylinder Lateral Area Calculator
Find the curved wall area of a cylinder without its ends.
Cone Volume Calculator
Find the volume of a right circular cone.
Cone Surface Area Calculator
Find a cone’s circular base and sloping surface area.
Cone Slant Height Calculator
Find the side length from cone tip to the base rim.
Sphere Surface Area Calculator
Find the outer area of a sphere from its radius.
Hemisphere Volume Calculator
Calculate the volume of half a sphere.
Hemisphere Total Surface Area Calculator
Find the curved hemisphere area plus its flat circular base.
Spherical Cap Volume Calculator
Find the volume cut from a sphere by a plane.
Square Pyramid Volume Calculator
Find the volume of a pyramid with a square base.
Square Pyramid Surface Area Calculator
Find the square base plus four equal triangular faces.
Triangular Prism Volume Calculator
Find volume from a triangle base, triangle height and prism length.
Cone Frustum Volume Calculator
Find the capacity between parallel cuts of a cone.
Ellipsoid Volume Calculator
Find the volume of an ellipsoid from its three semiaxes.
Torus Volume Calculator
Find the volume of a circular ring with a circular cross-section.
Torus Surface Area Calculator
Find the outer area of a ring torus.
Hollow Cylinder Material Volume Calculator
Find the material volume in a straight circular tube.
Line Intersection Calculator
Find the intersection of two infinite lines written in standard form ax + by = c.
Point to Line Distance Calculator
Calculate the perpendicular distance from a point to an infinite line ax + by + c = 0.
Triangle Centroid Calculator
Find the centroid of three planar vertices and the triangle’s area.
Triangle Circumcircle Calculator
Find the center and radius of the circle passing through three planar vertices.
Polygon Area from Coordinates Calculator
Find area and perimeter of a simple polygon from vertices listed in boundary order.
Triangle Inradius Calculator
Find the radius of a triangle’s inscribed circle from its three side lengths.
Triangle Orthocenter Calculator
Find the intersection of the altitudes for three planar vertices.
Triangle Median Calculator
Find all three median lengths from the sides of a triangle.
Ellipse Foci and Eccentricity Calculator
Find focal distance and eccentricity from an ellipse’s semimajor and semiminor axes.
Horizontal Cylinder Tank Volume Calculator
Calculate liquid volume in a level horizontal cylinder from fill depth.
Capsule Volume Calculator
Calculate volume and surface area of a cylinder capped by two hemispheres.
Spherical Zone Surface Area Calculator
Find the curved area of a spherical band between parallel planes.
Triangle Side Length Checker
Check whether three lengths form a triangle and classify its angle type.
Point to Line Segment Distance Calculator
Find the shortest distance from a point to a finite segment and locate the closest point.
Circle Intersection Area Calculator
Find the shared area of two disks from their radii and center separation.
Choosing a tool for geometry
Choose the shape and the measurement you need. Use radii rather than diameters when requested; square and cubic units describe different quantities.