Geometry & Shapes calculators
Area, volume, perimeter, triangles, circles and 3D shapes.
35 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 areaDistance Formula CalculatorFind the straight-line distance between two points in 2D or 3DPythagorean Theorem CalculatorFind the missing side of a right triangle with a² + b² = c²Slope 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 radiansVolume CalculatorVolume of 10 common 3D shapes, converted to liters, gallons and ft³
More geometry & shapes tools
Arc Length CalculatorArc length, central angle or radius — solve for whichever is missingCone CalculatorCone volume, slant height and surface area from radius and heightCylinder CalculatorCylinder volume, surface area, radius or height — plus liters and gallonsLaw 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 caseMidpoint CalculatorFind the midpoint of a segment — or the missing endpoint — instantlyPerimeter CalculatorPerimeter and area of rectangles, triangles, circles, ellipses and moreRegular Polygon CalculatorSide, area, perimeter, apothem and angles of any regular polygonRight 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 valueTank Volume CalculatorTotal and filled volume of cylinder, rectangular and capsule tanksTrapezoid CalculatorArea, perimeter, height, legs, diagonals and angles of any trapezoidChord 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 ovalFrustum CalculatorVolume and surface area of a truncated cone or square pyramidParallelogram CalculatorArea, perimeter, height, diagonals and angles from two sides and an anglePolygon 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 gallonsSector 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 sideTriangular Prism CalculatorVolume and surface area of a triangular prism from its three sides and length