Geometry
Reflection Calculator
Reflect points across an axis, a diagonal, or a custom straight line.
YOUR PRACTICAL TOOLKIT
Geometry Calculators
Make coordinate transformations easier to see.
35 tools availableNo account required
Geometry
Rotation Calculator
Rotate coordinate points around any center, with a visual comparison.
Geometry
Rectangle Calculator
Calculate rectangle area, perimeter, and diagonal.
Geometry
Square Calculator
Calculate square area, perimeter, and diagonal from a side length.
Geometry
Triangle Area Calculator
Find triangle area from a base and perpendicular height.
Geometry
Triangle Perimeter Calculator
Calculate a triangle perimeter from three side lengths.
Geometry
Circle Calculator
Calculate circle area, circumference, and diameter from radius.
Geometry
Trapezoid Area Calculator
Find trapezoid area from two parallel bases and height.
Geometry
Parallelogram Area Calculator
Calculate parallelogram area from base and perpendicular height.
Geometry
Rhombus Area Calculator
Calculate rhombus area from its two diagonals.
Geometry
Ellipse Area Calculator
Find ellipse area from the semi-major and semi-minor axes.
Geometry
Sector Area Calculator
Calculate the area of a circular sector from radius and central angle.
Geometry
Arc Length Calculator
Calculate circular arc length from radius and central angle.
Geometry
Regular Polygon Interior Angle Calculator
Find each interior angle and the total interior-angle sum of a regular polygon.
Geometry
Regular Polygon Area Calculator
Calculate regular polygon area from side count and side length.
Geometry
Pythagorean Theorem Calculator
Find the hypotenuse from two perpendicular legs.
Geometry
Right Triangle Calculator
Calculate a right triangle’s hypotenuse, area, and acute angles from two legs.
Geometry
Cube Calculator
Calculate cube volume, surface area, and space diagonal.
Geometry
Rectangular Prism Calculator
Calculate box volume, surface area, and space diagonal.
Geometry
Cylinder Calculator
Calculate cylinder volume and total surface area.
Geometry
Sphere Volume Calculator
Calculate the volume of a sphere from its radius.
Geometry
Sphere Surface Area Calculator
Calculate the surface area of a sphere.
Geometry
Cone Volume Calculator
Calculate the volume of a right circular cone.
Geometry
Cone Surface Area Calculator
Find total surface area of a right circular cone.
Geometry
Cone Slant Height Calculator
Find a cone’s slant height from radius and vertical height.
Geometry
Hemisphere Volume Calculator
Calculate the volume of a hemisphere.
Geometry
Square Pyramid Volume Calculator
Calculate volume from base side length and vertical height.
Geometry
Triangular Prism Volume Calculator
Calculate prism volume from triangle base, triangle height, and prism length.
Geometry
Cylinder Surface Area Calculator
Find total surface area of a closed cylinder.
Geometry
Annulus Area Calculator
Find the area between two concentric circles.
Geometry
Circle Chord Length Calculator
Find chord length from circle radius and central angle.
Geometry
Circle Segment Area Calculator
Estimate minor-segment area from radius and central angle.
Geometry
Sector Perimeter Calculator
Calculate arc length plus two radii for a circular sector.
Geometry
Ellipse Circumference Calculator
Approximate ellipse circumference with Ramanujan’s formula.
Geometry
Rectangle Diagonal Calculator
Find the diagonal of a rectangle from width and height.
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