IP331.com | Online Tools
HomeGeometry Tools
Geometry Tools

Geometry Calculators

89 free geometry calculators for shapes, triangles, circles, lines, areas, and coordinates.

Geometry Tools 89 tools

Collinear Points Calculator
Determine if three points are collinear using determinant and area method
Distance Between Two Points Calculator
Calculate straight-line distance between two coordinate points using the distance formula
Slope Calculator
Find slope from two coordinate points using rise over run with step-by-step work
Midpoint Calculator
Find the midpoint between two coordinate points by averaging x and y coordinates
Endpoint Calculator
Find a missing endpoint from one endpoint and midpoint using coordinate formulas
Point on Line Checker
Check whether a coordinate point satisfies a line equation Ax+By+C=0
Line Equation from Two Points Calculator
Find the equation of a line passing through two coordinate points
Section Ratio Calculator
Compute division point coordinates along a directed segment by given ratio
Point Symmetry Calculator
Find the reflected point of a point about line Ax+By+C=0
Angle Between Lines Calculator
Calculate the angle and tangent between two intersecting lines
Triangle Centers Calculator
Compute centroid, orthocenter, circumcenter, incenter and excenter of a triangle
Parallel Perpendicular Calculator
Determine if two lines are parallel, perpendicular, or intersecting
Parallel Line Through Point Calculator
Find a line parallel to Ax+By+C=0 through a given point
Perpendicular Line Through Point Calculator
Find a line perpendicular to Ax+By+C=0 through a given point
Perpendicular Bisector Calculator
Find the perpendicular bisector line equation given two endpoints
Angle Bisector Theorem Calculator
Apply the Angle Bisector Theorem to compute side ratios and bisector length
Centroid to Vertex Distance Calculator
Compute centroid coordinates and distances from centroid to each vertex
Circumradius & Inradius Calculator
Compute circumradius R and inradius r of any triangle from side lengths
Polygon Diagonal Calculator
Count total diagonals and diagonals per vertex for any n-sided polygon
Regular Polygon Area & Perimeter Calculator
Calculate area, perimeter, apothem, and circumradius of any regular polygon
Rectangle Area and Perimeter Calculator
Calculate rectangle area, perimeter, and diagonal from length and width
Square Area and Perimeter Calculator
Calculate square area, perimeter, and diagonal from side length
Trapezoid Area Calculator
Calculate trapezoid area from two bases and height
Parallelogram Area Calculator
Calculate parallelogram area and perimeter from base, height, and side length
Rhombus Area Calculator
Calculate rhombus area from two diagonals using d1*d2/2
Kite Area Calculator
Calculate kite area from two diagonals using d1*d2/2
Ellipse Area Calculator
Calculate ellipse area from semi-major and semi-minor axes using πab
Ellipse Circumference Calculator
Approximate ellipse circumference using Ramanujan formula
Interior Angle of Regular Polygon Calculator
Calculate each interior angle of a regular polygon from number of sides
Point Reflection Over Line Calculator
Find the reflective mirror point of a point across any line Ax+By+C=0
Midsegment Theorem Calculator
Apply the Triangle Midsegment Theorem to find midsegment lengths and medial triangle properties
Apothem Calculator
Compute the apothem, circumradius, area, and perimeter of any regular polygon
Chord Length Calculator
Calculate chord length, arc length, segment area, and sagitta from radius and central angle
Circle Circumference Calculator
Calculate circle circumference from radius using C=2πr with step-by-step work
Circle Area Calculator
Calculate circle area from radius using A=πr² with formula substitution
Annulus Area Calculator
Calculate ring area between two concentric circles using π(R²-r²)
Circle Segment Area Calculator
Calculate circular segment area from radius and central angle
Sector Perimeter Calculator
Calculate circular sector perimeter from radius and central angle
Diameter Calculator
Find circle diameter from radius using d=2r with clear geometry steps
Radius Calculator
Find circle radius from diameter using r=d/2 with simple steps
Circle Equation Calculator
Write the standard equation of a circle from center and radius
Circle Center and Radius Calculator
Find circle center and radius from general form x²+y²+Dx+Ey+F=0
Arc Length & Sector Area Calculator
Compute arc length, sector area, chord length, and sagitta of a circle sector
Tangent Line to Circle Calculator
Find the tangent line equation from an external point to a circle
Concave Polygon Area Calculator
Calculate the area of any simple concave or convex polygon using the Shoelace formula
Triangle Area Coordinate Calculator
Calculate triangle area from three coordinate points using the determinant formula
Triangle Perimeter Calculator
Calculate triangle perimeter from three side lengths and validate triangle inequality
Right Triangle Calculator
Find hypotenuse, area, and perimeter from two right-triangle legs
Pythagorean Theorem Calculator
Use a²+b²=c² to find the hypotenuse of a right triangle
3D Distance Calculator
Calculate distance between two points in three-dimensional coordinate space
Coordinate Perimeter Calculator
Calculate polygon perimeter from coordinate vertices using the distance formula
Heron's Formula Calculator
Compute triangle area, circumradius, inradius, and heights using Heron's formula from side lengths
Euler Line Calculator
Find the Euler line of a triangle and verify centroid, circumcenter, orthocenter collinearity
Law of Cosines Calculator
Find a missing triangle side from two sides and the included angle using the cosine rule
Triangle Angle Calculator
Find all three triangle angles from side lengths using the law of cosines
Similar Triangles Calculator
Find a missing corresponding side using proportional side lengths and scale factor
Equilateral Triangle Calculator
Calculate equilateral triangle area, height, perimeter, inradius, and circumradius
Cylinder Volume Calculator
Calculate cylinder volume and surface area from radius and height using πr²h
Sphere Volume Calculator
Calculate sphere volume, surface area, and diameter from radius using 4/3πr³
Cone Volume Calculator
Calculate cone volume, slant height, and surface area from radius and height
Rectangular Prism Volume Calculator
Calculate rectangular prism volume, surface area, and space diagonal
Triangular Prism Volume Calculator
Calculate triangular prism volume from triangle base, triangle height, and prism length
Pyramid Volume Calculator
Calculate pyramid volume from base area and vertical height using 1/3Bh
Semicircle Area Calculator
Calculate semicircle area and perimeter from radius using 1/2πr²
Hexagon Area Calculator
Calculate regular hexagon area, perimeter, and apothem from side length
Cube Volume Calculator
Calculate cube volume, surface area, and space diagonal from side length
Cube Surface Area Calculator
Calculate cube surface area, volume, and space diagonal from side length
Cylinder Surface Area Calculator
Calculate total and lateral surface area of a cylinder from radius and height
Cone Surface Area Calculator
Calculate total and lateral cone surface area from radius and slant height
Sphere Surface Area Calculator
Calculate sphere surface area, volume, and diameter from radius
Rectangular Prism Surface Area Calculator
Calculate box surface area, volume, and space diagonal from length, width, and height
Quarter Circle Area Calculator
Calculate quarter circle area and perimeter from radius using πr²/4
Pentagon Area Calculator
Calculate regular pentagon area, perimeter, and apothem from side length
Octagon Area Calculator
Calculate regular octagon area, perimeter, and apothem from side length
Frustum Volume Calculator
Calculate truncated cone volume from two radii and vertical height
Frustum Surface Area Calculator
Calculate truncated cone total and lateral surface area from radii and slant height
Capsule Area Calculator
Calculate capsule or stadium shape area and perimeter from radius and straight length
Capsule Perimeter Calculator
Calculate capsule or stadium shape perimeter and area from radius and straight length
Hemisphere Volume Calculator
Calculate hemisphere volume, curved area, and total surface area from radius
Hemisphere Surface Area Calculator
Calculate curved and total hemisphere surface area plus volume from radius
Ellipsoid Volume Calculator
Calculate ellipsoid volume from three semi-axis lengths using 4/3πabc
Torus Volume Calculator
Calculate torus volume and surface area from major radius and minor radius
Torus Surface Area Calculator
Calculate torus surface area and volume from major radius and minor radius
Heptagon Area Calculator
Calculate regular heptagon area, perimeter, and apothem from side length
Nonagon Area Calculator
Calculate regular nonagon area, perimeter, and apothem from side length
Decagon Area Calculator
Calculate regular decagon area, perimeter, and apothem from side length
Dodecagon Area Calculator
Calculate regular dodecagon area, perimeter, and apothem from side length
Triangular Prism Surface Area Calculator
Calculate triangular prism total surface area and volume from base sides and length
Pyramid Surface Area Calculator
Calculate square pyramid surface area, height, and volume from base side and slant height

Free online calculators and tools covering mathematics, unit conversion, text processing, and daily life. Accurate, fast, mobile-friendly, and completely free to use.

© 2026 IP331.com — Free Online Tools. All rights reserved.

About · Contact · Privacy Policy · Cookie Policy · Terms of Use · Disclaimer · Sitemap