Geometry & Shapes calculators
Area, volume, perimeter, triangles, circles and 3D shapes.
66 free tools
Most used
Area CalculatorFind the area of rectangles, triangles, circles and 7 more shapesCircle CalculatorEnter any one measurement and get radius, diameter, circumference and areaCube CalculatorVolume, surface area and diagonals of a cube from any one measurementDistance Formula CalculatorFind the straight-line distance between two points in 2D or 3DPolar to Rectangular ConverterConvert polar (r, θ) to Cartesian (x, y) coordinates and backPolygon Interior Angle CalculatorInterior angle sum, each interior and exterior angle for any polygonPythagorean Theorem CalculatorFind the missing side of a right triangle with a² + b² = c²Rectangle CalculatorSolve a rectangle’s area, perimeter, diagonal and sides from any two valuesScale Factor CalculatorFind the scale factor between similar shapes and scale areas and volumesSlope CalculatorSlope, angle, grade and line equation from two pointsSurface Area CalculatorTotal, lateral and base surface area of 7 common 3D shapesTriangle CalculatorSolve any triangle from 3 known values: SSS, SAS, ASA, AAS or SSATrigonometry Calculatorsin, cos, tan, csc, sec, cot and their inverses in degrees or radiansUnit Circle CalculatorExact sin, cos and tan values and the unit-circle point for any angleVolume CalculatorVolume of 10 common 3D shapes, converted to liters, gallons and ft³
More geometry & shapes tools
Annulus (Ring) CalculatorArea, width and circumferences of a ring between two circlesArc Length CalculatorArc length, central angle or radius — solve for whichever is missingCentral Angle CalculatorFind a circle’s central angle from arc length, chord or sector areaCentroid CalculatorCentroid of a triangle, a polygon or a set of points from coordinatesCircular Segment CalculatorArea, chord, arc length and height of a circular segmentCircumcircle & Incircle CalculatorCircumradius and inradius of any triangle or regular polygonCone CalculatorCone volume, slant height and surface area from radius and heightCoterminal Angle CalculatorPositive and negative coterminal angles in degrees or radiansCylinder CalculatorCylinder volume, surface area, radius or height — plus liters and gallonsHemisphere CalculatorVolume, curved and total surface area of a half sphere from any one valueHyperbola CalculatorVertices, foci, asymptotes and eccentricity from the standard equationLaw of Cosines CalculatorSolve any triangle from three sides (SSS) or two sides and an angle (SAS)Law of Sines CalculatorSolve AAS, ASA and SSA triangles — including the ambiguous caseMap Scale CalculatorTurn map distances into real distances — or find the scale of any mapMidpoint CalculatorFind the midpoint of a segment — or the missing endpoint — instantlyParabola CalculatorVertex, focus, directrix and axis of symmetry from y = ax² + bx + cParallel & Perpendicular Line CalculatorEquations of the parallel and perpendicular lines through any pointPerimeter CalculatorPerimeter and area of rectangles, triangles, circles, ellipses and morePipe Volume CalculatorHow much liquid a pipe holds — in gallons, litres and per footReference Angle CalculatorFind the reference angle and quadrant of any angle in secondsRegular Polygon CalculatorSide, area, perimeter, apothem and angles of any regular polygonRhombus CalculatorArea, perimeter, diagonals, height and angles from any two valuesRight Triangle CalculatorSolve a right triangle from any two values — sides, angles, area, altitudeSlope Intercept Form CalculatorWrite any line as y = mx + b — from two points, point-slope or standard formSphere CalculatorVolume, surface area and radius of a sphere or hemisphere from any one valueSpherical Cap CalculatorVolume and surface area of a dome or sphere slice from radius and heightTank Volume CalculatorTotal and filled volume of cylinder, rectangular and capsule tanksTrapezoid CalculatorArea, perimeter, height, legs, diagonals and angles of any trapezoidCapsule CalculatorVolume and surface area of a cylinder with hemispherical endsChord Length CalculatorChord length, sagitta, arc and radius of a circle from any two valuesCircle Equation CalculatorConvert between center-radius and general form, or fit a circle to 3 pointsComplementary and Supplementary Angles CalculatorFind the complement, supplement and explement of any angle instantlyEllipse CalculatorArea, perimeter, eccentricity and foci of any ellipse or ovalEllipsoid CalculatorVolume and surface area of any ellipsoid or spheroid from its three semi-axesFrustum CalculatorVolume and surface area of a truncated cone or square pyramidHexagonal Prism CalculatorVolume, surface area and diagonals of a regular hexagonal prismKite CalculatorArea, perimeter, diagonals and angles of a kite from sides or diagonalsParallelogram CalculatorArea, perimeter, height, diagonals and angles from two sides and an anglePoint to Line Distance CalculatorShortest distance from a point to a line or plane, with the closest pointPolygon Area from CoordinatesPaste vertex coordinates to get any polygon’s area, perimeter and centroidPyramid CalculatorVolume, slant height and surface area of square and rectangular pyramidsRectangular Prism CalculatorBox volume, surface area and diagonal — with litres and gallonsRotation, Reflection & Translation CalculatorRotate, reflect, translate or dilate points and shapes on the coordinate planeSector Area CalculatorArea of a circle sector and segment, plus arc length and chordSimilar Triangles CalculatorFind missing sides, the scale factor, or check whether two triangles are similarSpecial Right Triangles CalculatorSolve 30-60-90 and 45-45-90 triangles from any one sideSpherical & Cylindrical Coordinates ConverterConvert 3D points between Cartesian, cylindrical and spherical coordinatesTetrahedron CalculatorVolume, surface area, height and radii of a tetrahedronTorus CalculatorVolume and surface area of a torus (donut or ring) from its radiiTriangle Inequality CheckerCan these three sides make a triangle? Check it and classify the resultTriangular Prism CalculatorVolume and surface area of a triangular prism from its three sides and length