📐 Géométrie
Free geometry calculators and tools.
Arc Length Calculator
Calculate the arc length of any circle. Enter radius and angle in degrees or radians. Also computes
Sector Area Calculator
Calculate the area of a circle sector and its arc length. Enter radius and angle in degrees or radia
Semicircle Area Calculator
Calculate the area and perimeter of a semicircle. Enter radius or diameter and get instant results f
Ellipse Calculator
Calculate ellipse area, perimeter, and eccentricity. Enter semi-major and semi-minor axes for instan
Hexagon Calculator
Calculate regular hexagon area, perimeter, and diagonal. Enter side length for instant results. Perf
Octagon Calculator
Calculate regular octagon area, perimeter, and diagonal. Enter side length for instant geometry resu
Pentagon Calculator
Calculate regular pentagon area, perimeter, and diagonal. Enter side length for instant results. Inc
Trapezoid Calculator
Calculate trapezoid area and perimeter. Enter the two bases, height, and optionally the side lengths
Parallelogram Calculator
Calculate parallelogram area and perimeter from base, height, sides, or angles. Enter your measureme
Rhombus Calculator
Calculate rhombus area and perimeter from diagonals or side length. Fast, accurate, and free. Enter
Area of a Rectangle
Calculate rectangle area, perimeter, and diagonal. Enter length and width for instant results. Free
Area of a Square
Calculate the area, perimeter, and diagonal of a square. Enter the side length or diagonal and get i
Polygon Area Calculator
Calculate the area and perimeter of regular polygons. Enter the number of sides and side length for
Irregular Polygon Area
Calculate the area of any irregular polygon from vertex coordinates. Uses the shoelace formula for a
Regular Polygon Calculator
Calculate area, perimeter, and interior angles for regular polygons. Enter the number of sides and o
Perimeter Calculator
Calculate the perimeter of squares, rectangles, triangles, and circles. Enter your shape and dimensi
Perimeter of a Triangle
Calculate the perimeter and semiperimeter of any triangle. Enter the three side lengths and get inst
Perimeter of a Rectangle
Calculate the perimeter and area of a rectangle. Enter length and width for instant results. Free, f
Heron's Formula Calculator
Calculate triangle area using Heron's formula. Enter three side lengths and get the area instantly.
Equilateral Triangle Calculator
Calculate area, perimeter, and height of an equilateral triangle from one side. Fast, accurate, and
Isosceles Triangle Calculator
Calculate area, perimeter, and height of an isosceles triangle. Enter the equal sides and base to ge
Right Triangle Calculator
Calculate all properties of a right triangle from two sides. Get hypotenuse, area, and perimeter ins
Triangle Angle Calculator
Find the third angle of a triangle when you know two angles. Instant calculation using the 180-degre
Triangle Height Calculator
Calculate the height of a triangle from its area and base. Rearranges the area formula to solve for
Hypotenuse Calculator
Calculate the hypotenuse of a right triangle from the two legs. Uses a² + b² = c². Fast, accurate, a
Similar Triangles Calculator
Calculate missing sides in similar triangles using proportional relationships. Enter three known sid
30-60-90 Triangle Calculator
Calculate all sides of a 30-60-90 triangle from one side. Uses the 1 : √3 : 2 ratio. Fast, accurate,
45 45 90 Triangle Calculator
Calculate the sides and area of a 45-45-90 triangle. Enter a leg or hypotenuse to find all measureme
Equation of a Circle Calculator
Find the equation of a circle given center (h,k) and radius r. Get both standard form and general fo
Chord Length Calculator
Calculate the chord length of a circle given the radius and central angle. Also computes the corresp
Tangent Line to Circle Calculator
Find the equation of a tangent line to a circle at a given point. Enter the circle center, radius, a
Central Angle Calculator
Calculate the central angle of a circle from the arc length and radius. Get results in both degrees
Inscribed Angle Calculator
Calculate inscribed angles from central angles and vice versa. An inscribed angle is always half the
Complementary Angles Calculator
Find the complement of any angle. Complementary angles add up to 90 degrees. Enter an angle to insta
Supplementary Angles Calculator
Find the supplementary angle for any given angle. Supplementary angles add up to 180 degrees. Enter
Coterminal Angle Calculator
Find positive and negative coterminal angles for any given angle. Coterminal angles share the same t
Reference Angle Calculator
Find the reference angle for any angle in any quadrant. The reference angle is the acute angle forme
Golden Ratio Calculator
Calculate golden ratio proportions. Enter a value to find the longer or shorter segment in golden ra
Centroid Calculator
Find the centroid of a triangle from its three vertices. The centroid is at the average of the x and
Orthocenter Calculator
Find the orthocenter of a triangle from its three vertices. The orthocenter is where the three altit
Circumscribed Circle Calculator
Find the circumscribed circle (circumcircle) of a triangle from three vertices. Get the circumcenter
Cone Volume Calculator
Calculate the volume of a cone from its radius and height using V = (1/3)πr²h. Also find slant heigh
Sphere Volume Calculator
Calculate the volume and surface area of a sphere. Enter the radius to get the volume using V = (4/3
Cylinder Surface Area Calculator
Calculate the surface area of a cylinder. Enter radius and height to find the lateral surface area (
Pyramid Volume Calculator
Calculate the volume of a pyramid with a rectangular base. Enter base dimensions and height to get V
Rectangular Prism Volume Calculator
Calculate the volume, surface area, and space diagonal of a rectangular prism (box). Enter length, w
Ellipse Area Calculator
Calculate the area and perimeter of an ellipse. Enter the semi-major axis a and semi-minor axis b to
Trapezoid Area Calculator
Calculate the area of a trapezoid from its two parallel bases and height. Uses the formula A = ½(b₁
Triangular Prism Volume Calculator
Calculate triangular prism volume quickly and accurately. Enter your values and get instant results
Tetrahedron Volume Calculator
Calculate tetrahedron volume quickly and accurately. Enter your values and get instant results with
Trapezoidal Prism Volume Calculator
Calculate trapezoidal prism volume quickly and accurately. Enter your values and get instant results
Surface Area Of A Sphere Calculator
Calculate surface area of a sphere quickly and accurately. Enter your values and get instant results
Surface Area Of A Cylinder Calculator
Calculate surface area of a cylinder quickly and accurately. Enter your values and get instant resul
Surface Area Of A Cone Calculator
Calculate surface area of a cone quickly and accurately. Enter your values and get instant results w
Surface Area Of A Cube Calculator
Calculate surface area of a cube quickly and accurately. Enter your values and get instant results w
Surface Area Of A Rectangular Prism Calculator
Calculate surface area of a rectangular prism quickly and accurately. Enter your values and get inst
Surface Area Of A Triangular Prism Calculator
Calculate surface area of a triangular prism quickly and accurately. Enter your values and get insta
Surface Area Of A Hemisphere Calculator
Calculate surface area of a hemisphere quickly and accurately. Enter your values and get instant res
Surface Area Of A Pyramid Calculator
Calculate surface area of a pyramid quickly and accurately. Enter your values and get instant result
Slant Height Calculator
Calculate slant height quickly and accurately. Enter your values and get instant results with this f
Surface Area To Volume Ratio Calculator
Calculate surface area to volume ratio quickly and accurately. Enter your values and get instant res
Cross Sectional Area Calculator
Calculate cross sectional area quickly and accurately. Enter your values and get instant results wit
Torus Surface Area Calculator
Calculate torus surface area quickly and accurately. Enter your values and get instant results with
Volume Of A Parallelepiped Calculator
Calculate volume of a parallelepiped quickly and accurately. Enter your values and get instant resul
Frustum Volume Calculator
Calculate frustum volume quickly and accurately. Enter your values and get instant results with this
Equation Of A Sphere Calculator
Calculate equation of a sphere quickly and accurately. Enter your values and get instant results wit
Parabola Calculator
Calculate parabola quickly and accurately. Enter your values and get instant results with this free
Conic Sections Calculator
Calculate conic sections quickly and accurately. Enter your values and get instant results with this
Hyperbola Calculator
Calculate hyperbola quickly and accurately. Enter your values and get instant results with this free
Latus Rectum Calculator
Calculate latus rectum quickly and accurately. Enter your values and get instant results with this f
Eccentricity Calculator
Calculate eccentricity quickly and accurately. Enter your values and get instant results with this f
Rhombus Area Calculator
Calculate rhombus area quickly and accurately. Enter your values and get instant results with this f
Regular Polygon Area Calculator
Calculate regular polygon area quickly and accurately. Enter your values and get instant results wit
Spherical Cap Volume Calculator
Calculate spherical cap volume quickly and accurately. Enter your values and get instant results wit
Annulus Area Calculator
Calculate annulus area quickly and accurately. Enter your values and get instant results with this f