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Geometry & Trigonometry Calculators
Area, volume, perimeter, triangle, circle, angle and trigonometry calculators. 46 free tools that run in your browser, no sign-up needed.
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Roofing Calculator (Roof Squares)Estimate roof area, squares, shingle bundles and cost from pitch.Square Root CalculatorFind square, cube and nth roots with simplified radical form and steps.Body Surface Area CalculatorCalculate body surface area in m² with the Du Bois, Mosteller, Haycock and other formulas.Pythagorean Theorem CalculatorSolve for the hypotenuse or a missing leg of a right triangle, with a diagram and steps.Area CalculatorFind the area of squares, rectangles, triangles, circles, trapezoids, ellipses and sectors.Volume CalculatorVolume of a cube, box, cylinder, sphere, cone, pyramid or capsule, in liters and gallons too.Surface Area CalculatorSurface area of a cube, box, cylinder, sphere, cone or pyramid, with lateral and base areas.Circle CalculatorEnter a circle's radius, diameter, circumference or area and get all the others.Triangle CalculatorSolve any triangle from SSS, SAS, ASA, AAS or right-triangle values: sides, angles, area, type.Slope CalculatorSlope, angle, line equation y = mx + b and distance from two points, with a graph.Midpoint CalculatorFind the midpoint of two points in 2D or 3D, or the missing endpoint from a midpoint.Distance Formula CalculatorDistance between two points in 2D or 3D with step-by-step work and an exact radical answer.Vector Calculator2D and 3D vectors: add, subtract, dot and cross product, magnitude, angle, unit vector, projection.Pascal's Triangle GeneratorGenerate Pascal's triangle up to row 30, highlight a row and expand (ax + by)ⁿ.Trigonometry CalculatorSin, cos, tan, csc, sec, cot and inverses in degrees or radians, with exact values.Arc Length CalculatorArc length, sector area and chord from radius and angle, or solve for the radius or angle.Cylinder Volume CalculatorCylinder volume in liters, gallons and cubic units from radius or diameter, plus surface area.Regular Polygon CalculatorArea, perimeter, apothem, radius and angles of a regular polygon from any one measurement.Aquarium Volume CalculatorFish tank gallons, liters and water weight: rectangle, cylinder, bow-front and hexagon tanks.Tank Volume CalculatorTotal and filled volume of cylinder, rectangular and capsule tanks in gallons and liters.Circle Skirt CalculatorWaist radius, fabric yardage and cutting layout for full, half or quarter circle skirts.Ellipse CalculatorArea, perimeter (Ramanujan), eccentricity, foci and equation of an ellipse from its axes.Camera Field of View CalculatorAngle of view and frame size from focal length, sensor size and subject distance.Law of Sines and Cosines CalculatorSolve SSS, SAS, ASA, AAS and SSA triangles with the laws of sines and cosines, steps shown.Miter Angle CalculatorMiter saw angle for any polygon or corner, plus crown molding miter and bevel settings.Simplify Square Root CalculatorSimplify square, cube and nth roots to simplest radical form a√b, with steps.Interactive Unit CircleDrag an angle on the unit circle to see degrees, radians and exact sin, cos and tan. Printable chart.Cone Volume CalculatorVolume, slant height and surface area of a right cone from its radius and height.Perimeter CalculatorPerimeter of a square, rectangle, triangle, circle, trapezoid, polygon or sector, with a diagram.Point Slope Form CalculatorLine equation in point-slope form from a point and slope or two points, plus y = mx + b.Polar to Cartesian ConverterConvert polar coordinates (r, θ) to rectangular (x, y) with steps, a plot and bulk lists.Right Triangle CalculatorSolve a right triangle from any two values: sides, angles, area, perimeter and altitude.Slope Intercept Form CalculatorGet y = mx + b from two points, a point and slope, or standard form, with steps and a graph.Sphere Volume CalculatorVolume and surface area of a sphere from radius, diameter or circumference, or the reverse.Trapezoid Area CalculatorArea, perimeter, median and missing base or height of a trapezoid, with a diagram.30-60-90 Triangle CalculatorEnter one side of a 30-60-90 triangle to get the other sides, area and perimeter in exact radical form.45-45-90 Triangle CalculatorSolve an isosceles right triangle from a leg or hypotenuse, with sides in exact √2 form.Complementary and Supplementary Angle CalculatorComplement, supplement and explement of any angle in degrees or radians, with diagrams.Coordinate Plane PlotterPlot points, segments and polygons on an interactive coordinate grid, or print blank planes.Coterminal Angle CalculatorList positive and negative coterminal angles and the principal angle, in degrees and radians.Heron's Formula CalculatorFind a triangle's area from its three sides with Heron's formula, semi-perimeter and steps.Implicit Differentiation CalculatorFind dy/dx for any equation in x and y with steps, plus the slope and tangent at a point.Inverse Trig Calculatorarcsin, arccos, arctan, arcsec, arccsc and arccot in degrees and radians, with exact values.Polygon Area from CoordinatesArea, perimeter and centroid of any polygon from its vertex coordinates (shoelace formula).Reference Angle CalculatorFind the reference angle and quadrant of any angle in degrees or radians, with a unit circle sketch.Tangent Line CalculatorFind the tangent and normal line to f(x) at a point, with the derivative, slope and a graph.
About Geometry & Trigonometry Calculators
Find area, volume, perimeter, angles and side lengths for common shapes, plus triangle and trigonometry problems. Students can use them to check their working.
Most used here: Roofing Calculator (Roof Squares), Square Root Calculator and Body Surface Area Calculator.