Geometry Calculators
Browse our comprehensive collection of geometry calculators for area, volume, perimeter, angles, trigonometry, coordinate geometry, transformations, and more. Free online tools for students, teachers, engineers, and professionals.
Triangle Area Calculator
Find area of a triangle using base/height, Heron's formula, or coordinates.
areaRectangle Area & Perimeter
Calculate area and perimeter of a rectangle, square, or parallelogram.
areaTrapezoid Area Calculator
Compute the area of a trapezoid with base lengths and height.
areaCircle Area & Circumference
Calculate area and circumference of a circle from radius, diameter, or circumference.
areaEllipse Area Calculator
Find the area of an ellipse given semi-major and semi-minor axes.
areaRegular Polygon Area
Compute area and perimeter of any regular polygon from side length or radius.
areaParallelogram Area
Calculate area of a parallelogram using base and height or side lengths and angle.
areaRhombus Area Calculator
Compute area of a rhombus using diagonals or side length and angle.
areaRectangular Prism Volume
Calculate volume and surface area of a box (cuboid) given length, width, height.
volumeSphere Volume & Surface Area
Compute volume and surface area of a sphere from radius or diameter.
volumeCylinder Volume & Surface Area
Find volume and surface area of a cylinder from radius and height.
volumeCone Volume & Surface Area
Calculate volume and surface area of a cone from radius and height or slant height.
volumePyramid Volume & Surface Area
Compute volume and surface area of a pyramid with square or rectangular base.
volumeTorus Volume & Surface Area
Find volume and surface area of a torus (donut) from major and minor radii.
volumeTriangular Prism Volume
Calculate volume of a triangular prism using base triangle area and height.
volumeHexagonal Prism Volume
Compute volume of a hexagonal prism using side length and height.
volumeTriangle Angle Sum
Find missing angle in a triangle given two angles, or verify angle sum.
anglePythagorean Theorem
Solve for missing side in a right triangle using the Pythagorean theorem.
angle30-60-90 Triangle Solver
Find side lengths in a 30-60-90 special right triangle from any given side.
angle45-45-90 Triangle Solver
Find side lengths in a 45-45-90 isosceles right triangle.
angleLaw of Sines
Solve triangles using the Law of Sines (SSA, ASA, AAS cases).
angleLaw of Cosines
Solve triangles using the Law of Cosines (SAS, SSS cases).
angleAngle Bisector Calculator
Calculate angle bisector length and properties in a triangle.
angleTriangle Median Calculator
Calculate median lengths and properties in a triangle.
angleSine, Cosine, Tangent
Calculate sin, cos, tan, and their inverses for any angle (degrees/radians).
trigRight Triangle Trig Solver
Find missing sides and angles in a right triangle using SOH-CAH-TOA.
trigTrigonometric Identities
Simplify or verify trigonometric identities with step-by-step transformations.
trigUnit Circle Calculator
Find sine, cosine, tangent values for common angles on the unit circle.
trigTrigonometric Equation Solver
Solve trigonometric equations with step-by-step solutions.
trigTrigonometric Function Graph
Graph sine, cosine, tangent functions with amplitude, period, and phase shift.
trigDegrees to Radians Converter
Convert between degrees and radians with step-by-step conversion.
trigInverse Trig Functions
Calculate arcsin, arccos, arctan and their values in degrees or radians.
trigDistance Between Two Points
Calculate the Euclidean distance between two points in 2D or 3D.
coordinateMidpoint Calculator
Find the midpoint of a line segment given endpoints in 2D or 3D.
coordinateSlope of a Line
Compute slope between two points and determine line equation.
coordinateEquation of a Line
Find linear equation in slope-intercept, point-slope, or standard form from given data.
coordinateCircle Equation
Find center and radius from standard or general equation of a circle.
coordinateIntersection of Two Lines
Find intersection point of two lines in 2D, or determine if parallel/coincident.
coordinatePerpendicular Bisector
Find the perpendicular bisector of a line segment with step-by-step work.
coordinateDistance from Point to Line
Calculate the shortest distance from a point to a line in 2D.
coordinateTranslation Calculator
Translate points or shapes by a given vector in 2D.
transformReflection Calculator
Reflect points or shapes across the x-axis, y-axis, or any line.
transformRotation Calculator
Rotate points or shapes by a given angle around the origin or any point.
transformDilation/Scale Factor
Scale points or shapes by a given factor from the origin or a center point.
transformShear Transformation
Apply shear transformation to points in 2D with step-by-step matrix multiplication.
transformComposition of Transformations
Apply multiple transformations in sequence with visualization.
transformAffine Transformation Matrix
Calculate affine transformation matrix and apply to points.
transformInverse Transformation
Find inverse of a transformation matrix and apply to points.
transformCircle Calculator
Find radius, diameter, circumference, area, and arc length from any one parameter.
circleSector Area & Arc Length
Calculate sector area and arc length given radius and central angle.
circleSegment Area
Find area of a circular segment given radius and central angle.
circleCentral Angle Solver
Find central angle from arc length and radius, or vice versa.
circleChord Length Calculator
Calculate chord length from radius and central angle or sagitta.
circleTangent Length Calculator
Calculate length of a tangent from a point to a circle.
circleCircle Equation from Center & Radius
Derive circle equation in standard and general form from center and radius.
circleCircle Intersection
Find intersection points of two circles and calculate overlap area.
circleRegular Polygon Calculator
Find area, perimeter, apothem, interior angle, and more for any regular polygon.
polygonTriangle Solver (AAA, SAS, etc.)
Solve any triangle given sides and/or angles using multiple methods.
polygonQuadrilateral Area
Compute area of general quadrilateral using diagonal and perpendicular distances.
polygonHexagon Calculator
Calculate area, perimeter, diagonals, and other properties of a regular hexagon.
polygonPentagon Calculator
Compute area, perimeter, diagonals, and other properties of a regular pentagon.
polygonOctagon Calculator
Calculate area, perimeter, diagonals, and other properties of a regular octagon.
polygonInterior/Exterior Angle Finder
Find sum of interior angles and measure of each interior/exterior angle for any polygon.
polygonPolygon Diagonal Count
Calculate the number of diagonals in a polygon with n sides.
polygonWhat Are Geometry Calculators?
Our Geometry Calculators collection provides a comprehensive set of tools for solving problems in two- and three-dimensional geometry. Whether you need to compute area, volume, perimeter, angles, or work with trigonometric functions, coordinate geometry, or transformations, these calculators deliver accurate results with clear step-by-step explanations.
Designed for students, educators, engineers, architects, and anyone who works with spatial concepts, our tools help you tackle everything from basic shapes to complex geometric analyses with confidence.
How to Use This Directory
- Search: Type a keyword into the search bar to find specific tools by name or description.
- Filter by Category: Use the dropdown to narrow down calculators by geometry topic — each option shows the number of tools available.
- Click to Use: Each calculator card links directly to the tool. Click on any card to start your geometry computation instantly.
- Explore More: Check the "Explore More Math & Geometry Tools" section for related calculators across other categories.
Why Use Our Geometry Calculators?
- Comprehensive: Covers area, perimeter, volume, surface area, angles, triangles, trigonometry, coordinate geometry, transformations, circles, polygons, and more.
- Step-by-Step: Many calculators show detailed solution steps, reinforcing understanding of geometric formulas and methods.
- Free & Accessible: No registration or fees — use any tool instantly on any device.
- Educational & Practical: Ideal for homework, test preparation, professional design, and everyday problem-solving.
- Accurate & Reliable: Built with robust algorithms and rigorously tested for precision.
❓ Geometry Calculators FAQ
What types of geometry problems can I solve?
You can solve problems involving area, perimeter, volume, surface area, angles, right triangles, trigonometric functions, coordinate geometry (distance, midpoint, slope, line equations), transformations (translation, reflection, rotation, dilation), and circle/polygon properties.
How do I calculate the area of a triangle if I only know the side lengths?
Use the Triangle Area Calculator with Heron's formula. Enter the three side lengths and the calculator will compute the area without needing the height.
What is the difference between volume and surface area?
Volume measures the amount of space inside a 3D object, while surface area is the total area of its exterior surfaces. Our volume calculators provide both measures for common solids.
How do I find the missing side of a right triangle?
Use the Pythagorean Theorem calculator. Enter any two side lengths (legs or hypotenuse) and it will solve for the missing one.
What is the Law of Sines and when do I use it?
The Law of Sines relates the sides of a triangle to the sines of its angles. It's used for solving triangles when you know two angles and one side (AAS, ASA) or two sides and a non-included angle (SSA).
How do I convert between degrees and radians for trigonometry?
Our Trigonometry calculators accept both degrees and radians. You can input angles in either unit, and the results will be displayed accordingly.
What is the unit circle and why is it important?
The unit circle is a circle with radius 1 centered at the origin. It's a fundamental tool for understanding trigonometric functions. Our Unit Circle Calculator shows sine, cosine, and tangent values for common angles.
How do I find the distance between two points on a coordinate plane?
Use the Distance Between Two Points calculator. Enter the coordinates of both points, and it will compute the straight-line distance using the Euclidean distance formula.
What is the difference between translation, rotation, and reflection?
Translation moves a shape without changing orientation; rotation turns a shape around a point; reflection flips a shape across a line. Our transformation calculators perform each of these with clear visual output.
How do I calculate the area of a regular polygon?
Use the Regular Polygon Calculator. Enter the number of sides and either the side length, apothem, or radius, and it will compute the area, perimeter, and other properties.
Are these calculators suitable for professional use (engineering, architecture)?
Yes, the calculators are accurate and reliable for professional calculations. They are frequently used by students and professionals alike for quick checks and design work.
How often are new geometry tools added?
We regularly add new calculators based on user feedback and emerging needs. If you have a suggestion, please contact us via the contact page.