Geometry Calculators

47 free geometry calculators in Math.

Angle Between Lines CalculatorCalculate the acute angle between two lines given their slopes.
Annulus Area CalculatorCompute the area of an annulus (ring) from the outer and inner radii.
Arc Length CalculatorCompute the arc length of a circle given its radius and central angle in degrees.
Area CalculatorCalculate the area of rectangles, triangles, circles, trapezoids, ellipses and sectors.
Chord Length CalculatorCalculate the length of a chord from the circle radius and central angle.
Circle CalculatorSolve a circle from radius, diameter, circumference or area — any one gives the rest.
Circle Equation CalculatorDerive the standard and general equations of a circle from its center and radius.
Cone CalculatorCalculate volume, total surface area, lateral area and slant height of a right cone.
Cube (Solid) CalculatorCompute volume, surface area, face diagonal and space diagonal of a cube.
Cuboid CalculatorCalculate volume, surface area and space diagonal of a rectangular cuboid.
Cylinder CalculatorCompute volume, total surface area and lateral area of a right circular cylinder.
Distance CalculatorMeasure distance between 2D or 3D points, and great-circle distance between coordinates.
Ellipse CalculatorCalculate area, circumference, eccentricity and foci of an ellipse from its semi-axes.
Equilateral Triangle CalculatorCompute all properties of an equilateral triangle from one side length.
Heron's Formula CalculatorCompute triangle area from three sides using Heron's formula with triangle inequality validation.
Hexagon CalculatorCompute area, perimeter, apothem and interior angle of a regular hexagon.
Hyperbola CalculatorCompute eccentricity, foci, vertices and asymptotes of a hyperbola from a and b.
Isosceles Triangle CalculatorCalculate area, perimeter, height and angles of an isosceles triangle from its equal sides and base.
Kite CalculatorFind the area and perimeter of a kite from its two diagonals and side pairs.
Line Equation CalculatorDetermine the equation of a line through two points in slope-intercept and standard forms.
Midpoint CalculatorFind the midpoint between two points in the Cartesian plane.
Parabola CalculatorFind the vertex, focus, directrix and axis of symmetry of a parabola y=ax²+bx+c.
Pentagon CalculatorCompute area, perimeter, apothem and interior angle of a regular pentagon.
Point-Circle Position CalculatorDetermine whether a point lies inside, on, or outside a circle.
Point-to-Line Distance CalculatorCompute the perpendicular distance from a point to a line Ax+By+C=0.
Prism CalculatorCalculate volume and surface area of a triangular prism from base dimensions and length.
Pyramid CalculatorCompute volume and surface area of a regular square pyramid from base side and height.
Pythagorean Theorem CalculatorFind any missing side of a right triangle using a² + b² = c².
Rectangle CalculatorCalculate area, perimeter and diagonal of a rectangle from length and width.
Reflection CalculatorReflect a point across the x-axis, y-axis, origin, or the line y=x.
Regular Polygon CalculatorCalculate area, perimeter, apothem and angles of any regular polygon given sides and length.
Rhombus CalculatorCalculate area, perimeter and angles of a rhombus from its side and diagonals.
Right Triangle CalculatorSolve a right triangle from any two values, with angles, area and perimeter.
Rotation CalculatorRotate a point by a given angle in degrees about an arbitrary centre of rotation.
Scalene Triangle CalculatorCalculate area, perimeter and angles of a scalene triangle from three unequal sides.
Sector Area CalculatorFind the area of a circular sector from its radius and central angle.
Segment Area CalculatorCalculate the area of a circular segment (sector minus triangle) from radius and angle.
Sphere CalculatorCalculate volume, surface area, diameter and circumference of a sphere from its radius.
Square CalculatorCompute area, perimeter, diagonal and inradius of a square from its side length.
Surface Area CalculatorCompute the surface area of common three-dimensional solids.
Torus CalculatorCompute volume and surface area of a torus from its major and minor radii.
Translation CalculatorTranslate a point by a displacement vector (dx, dy) and return the image coordinates.
Trapezoid CalculatorCalculate area, perimeter and median of a trapezoid from its parallel sides and height.
Triangle Area CalculatorCalculate the area of a triangle from its base and height.
Triangle CalculatorSolve any triangle from three known values using the sine and cosine rules.
Triangle Perimeter CalculatorFind the perimeter of a triangle by summing all three side lengths.
Volume CalculatorFind the volume of spheres, cones, cubes, cylinders, pyramids and more.